Like simple life in college, until having to be evacuated into vault (11)
I believe the answer is:
unicellular
'like simple' is the definition.
'unicellular' can be an answer for 'simple' (I've seen this before). I am not sure about the 'like' bit.
'life in college until having to be evacuated into vault' is the wordplay.
I cannot really understand how this works, but
'college' could be 'uni' (short for university) and 'uni' is located in the answer.
The remaining letters 'cellular' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for unicellular that I've seen is " Simple".)