Put up with a disheartened reverend being an accepted model (8)
I believe the answer is:
standard
'model' is the definition.
(I've seen this before)
'put up with a disheartened reverend being an accepted' is the wordplay.
'put up with' becomes 'stand' ('stand' can be a synonym of 'put up with'**).
'a disheartened' suggests removing the centre.
'being an' becomes 'a'.
'accepted' is an insertion indicator.
'reverend' with its middle removed is 'rd'.
'stand'+'rd'='standrd'
'standrd' going around 'a' is 'STANDARD'.
(Other definitions for standard that I've seen before include "Typical, normal" , "Reference point against which other things can be evaluated" , "Classic" , "Grade" , "Accepted model - flag" .)