Archbishop, perhaps large chap under cape (6)
I believe the answer is:
cleric
'archbishop' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'large chap under cape' is the wordplay.
'large' becomes 'L' (eg in clothes sizes).
'chap' becomes 'eric' ().
'under' says to put letters next to each other (below, in a down clue).
'cape' becomes 'c' (abbreviation used on maps).
'l'+'eric'='leric'
'leric' put after 'c' is 'CLERIC'.
'perhaps' acts as a link.
Can you help me to learn more?
(Other definitions for cleric that I've seen before include "Priest, religious leader" , "Member of the clergy" , "Person in holy orders" , "Divine" , "Church minister" .)