Assign post to a priest on promontory (7)
I believe the answer is:
appoint
'assign post' is the definition.
'appoint' can be an answer for 'assign' (assign can mean to appoint or delegate). I'm not sure about the 'post' bit.
'a priest on promontory' is the wordplay.
'priest' becomes 'p' (ecclesiastical abbreviation).
'on' is a charade indicator (letters next to each other).
'promontory' becomes 'point' (point is a kind of promontory).
'a'+'p'+'point'='APPOINT'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for appoint that I've seen before include "Determine (a time/place)" , "Furnish" , "get the post sorted" , "Fix" , "Nominate" .)