Shade turns up by church (4)
I believe the answer is:
puce
'shade' is the definition.
(I've seen this before)
'turns up by church' is the wordplay.
'turns' says the letters should be written backwards.
'by' is a charade indicator (letters next to each other).
'church' becomes 'ce' (abbreviation for Church of England).
'up' backwards is 'pu'.
'pu'+'ce'='PUCE'
(Other definitions for puce that I've seen before include "Pinkish purple" , "Brownish-purple colour" , "Purplish-brown colour" , "Dark red or purple-brown colour" , "Shade" .)