Category of ecological interest about to be moved to the back (5)
I believe the answer is:
genre
'category' is the definition.
(I know that genre is a type of form)
'ecological interest about to be moved to the back' is the wordplay.
I cannot really see how this works, but
'about' could be 're' ('re' means regarding or about) and 're' is found within the answer.
The remaining letters 'gen' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' acts as a link.
Can you help me to learn more?
(Other definitions for genre that I've seen before include "Literary or artistic type or style" , "expressive style of music" , "Brand" , "Style (of art/literature)" , "Writing style" .)