Environment not entirely welcomed by bowler, say (7)
I believe the answer is:
habitat
'environment' is the definition.
(I know that habitat is a type of environment)
'not entirely welcomed by bowler say' is the wordplay.
'not entirely' becomes 'abit' (I can't explain this - if you can you should believe this answer much more).
'welcomed by' means one lot of letters goes inside another (letters welcomed inside).
'bowler say' becomes 'hat' (bowler is a type of hat).
'abit' put within 'hat' is 'HABITAT'.
Can you help me to learn more?
(Other definitions for habitat that I've seen before include "One's normal environment" , "Territory" , "Natural environment (of creature)" , "(Organism's) natural home" , "Bath at 1? (anag)" .)