Praiseworthy and clever to support archbishop (8)
I believe the answer is:
laudable
'praiseworthy' is the definition.
(synonyms)
'clever to support archbishop' is the wordplay.
'clever' becomes 'able' (able can mean skilled or talented).
'to support' means one lot of letters go next to another (in a down clue, some letters hold up others).
'archbishop' becomes 'laud' (Archbishop of Canterbury William Laud).
'able' put after 'laud' is 'LAUDABLE'.
'and' is the link.
(Other definitions for laudable that I've seen before include "Good enough to praise" , "Praiseworthy, commendable" , "Worthy of high praise" , "Meritorious" , "Excellent" .)