Informal discussion about mid-evening prayer? (5)
I believe the answer is:
chant
'prayer?' is the definition.
(a prayer might be chanted)
'informal discussion about mid-evening' is the wordplay.
'informal discussion' becomes 'chat' (a chat is a casual conversation).
'about' indicates putting letters inside.
'mid' means to look at the middle letters (mid- can mean the middle of something).
The central letter of 'evening' is 'n'.
'chat' enclosing 'n' is 'CHANT'.
(Other definitions for chant that I've seen before include "Repeated rhythmic phrase" , "Mantra" , "Recite singingly" , "Vocal music" , "Song (on the terraces?)" .)