Thrilled comment about priest's riding trick (7)
I believe the answer is:
wheelie
'riding trick' is the definition.
(trick done on a vehicle with wheels)
'thrilled comment about priest's' is the wordplay.
'thrilled comment' becomes 'whee' (exclamation made when thrilled or excited).
'about' indicates putting letters inside.
'priest' becomes 'eli' (biblical figure).
'whee' placed around 'eli' is 'WHEELIE'.
(Other definitions for wheelie that I've seen before include "A bicycle trick and a bin" , "Biking trick" , "riding skill" , "Manoeuvre" , "dangerous move on bike?" .)