It's the other way around for me with Spanish. German is a beast of a language once you take into consideration the grammar and gender, and I find it a lot easier to form sentences in Spanish or really Romance languages in general as long as I know the vocabulary.
I think it's because I've had more experience with them compared to German.
What you've heard is about combining nouns into one long noun (without spaces). The English "it's" is a contraction, not a combination. Perhaps in German such contractions are also used in advertising slogans - according to Google Translate Werbeslogans -, but I have no experience with such contractions.
Of course it can, but in rather limited ways, mainly in maritime or military speak.
"Klar zum Gefecht" = "Ready for the fight"
Command before turning round the sail, and changing the boats course when going against the wind:
Captain: "Klar zur Wende!"
Answer: "Ist klar!"
Apart from naval use, "klar" can be useful, whenever some kind of vehicle is involved. When you are going for a journey by car, and the suitcases and the children are safely inside, it is usual to say: "Wir sind klar zur Abfahrt" (= we are ready for departure)
Well, in the sentence given here by DL, just "Es ist klar" , nobody would suspect a command (nor a vehicle) It means "the matter is clear, transparent, easy to understand, no doubt about it"
When you use "Es ist klar", the sentence should go on somehow: "Es ist klar, daß........."
When you want to have a 3-word-sentence you better use "Das ist klar!"
It is clear... that I'm going to have another day on my streak! Its quiet nice all these words here looking like English ones, but then again reading the comment below me it seems that the way I used it at the top is wrong... or is it? is it ALWAYS clear (transparent) objects?
Es ist Klar Der-er die-sie das-es Eg. Der Hund ist groß-Er ist groß. The dog is big Die Kiste ist groß-Sie ist groß. The box is big Das Auto ist groß-Es ist groß. The car is big I have learned while learning my German that there's not such a clear cut line between he, it and her as in English