Rising artist in church constructed nice feature for the opening (4)
I believe the answer is:
arch
'for the opening' is the definition.
(I've seen this before)
'rising artist in church' is the wordplay.
'rising' is a reversal indicator (in a down clue, letters go up).
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'in church' becomes 'ch' (common abbreviation. I am not sure about the 'in' bit.).
'ra' back-to-front is 'ar'.
'ar'+'ch'='ARCH'
'constructed nice feature' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for arch that I've seen before include "Inner side of foot" , "Curved entrance" , "Prefix meaning cheif, perhaps enemy" , "(archaic)" , "Curved part of the foot" .)