Prays in eastern temple yard, initially displaying this? (5)
I believe the answer is:
piety
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'prays in eastern temple yard initially' is the wordplay.
'initially' suggests taking the first letters.
The first letters of 'prays in eastern temple yard' is 'PIETY'.
'displaying' acts as a link.
(Other definitions for piety that I've seen before include "Reverent quality" , "religious behaviour" , "Being faithful" , "Godly behaviour" , "Quality of being religious" .)