Arrested by church, father turning red (6)
I believe the answer is:
cerise
'red' is the definition.
(synonyms)
'arrested by church father turning' is the wordplay.
'arrested by' is an insertion indicator (inserted letters are held or arrested).
'church' becomes 'ce' (Church of England).
'father' becomes 'sire' (synonyms).
'turning' is a reversal indicator.
'sire' in reverse letter order is 'eris'.
'ce' placed around 'eris' is 'CERISE'.
(Other definitions for cerise that I've seen before include "Cherry red colour" , "Shade of red" , "Pinkish-red" , "Light clear red" , "Vivid reddish-pink" .)