Church finds unlimited love in any fish (7)
I believe the answer is:
anchovy
'fish' is the definition.
(I know that anchovy is a type of fish)
'church finds unlimited love in any' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'finds' means one lot of letters go next to another.
'unlimited' indicates the central letters (discard the edges or 'limits' of the word).
'in' indicates putting letters inside.
The middle letters of 'love' are 'ov'.
'ch'+'ov'='chov'
'chov' placed inside 'any' is 'ANCHOVY'.
(Other definitions for anchovy that I've seen before include "Small fish of herring family, nice on toast" , "Small salty fish" , "Little fish, usually tinned or salted" , "Small strongly-flavoured food fish" , "Brit often found pickled" .)