Arm perhaps supporting priest with doctor (8)
I believe the answer is:
forelimb
'arm' is the definition.
(I've seen this before)
'supporting priest with doctor' is the wordplay.
'supporting' becomes 'for'.
'priest' becomes 'eli' (biblical figure).
'with' says to put letters next to each other.
'doctor' becomes 'mb' (Bachelor of Medicine, Medicinae Baccalaureus).
'for'+'eli'+'mb'='FORELIMB'
'perhaps' is the link.
(Other definitions for forelimb that I've seen before include "Arm" , "Front leg" , "section of body" .)