Priest to shave round bottom of beard (5)
I believe the answer is:
padre
'priest' is the definition.
(I know that Padre is a type of priest)
'shave round bottom of beard' is the wordplay.
'shave' becomes 'pare' (I've seen this in another clue).
'round' means one lot of letters goes inside another.
'bottom of' suggests the final letters.
The final letter of 'beard' is 'd'.
'pare' going around 'd' is 'PADRE'.
'to' acts as a link.
(Other definitions for padre that I've seen before include "Father" , "Minister" , "Services' chaplain" , "clerical worker" , "Army serviceman?" .)