Some stores collectively fold perhaps (7)
I believe the answer is:
Here is my best explanation:
'fold perhaps' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'some stores collectively' is the wordplay.
I cannot really see how this works, but
'some' could be 'abit' (a bit ) and 'abit' is found in the answer.
The remaining letters 'hat' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
(Other definitions for habitat that I've seen before include "Animal's natural home", "One's normal environment", "Bath at 1? (anag)", "Abode", "Living area", "Where something's usually found", "Natural home of an organism", "Territory", "Usual abode" and "(Organism's) natural home".)