Councillor's wearing jumper and vest for Swedes, maybe (4,4)
I believe the answer is:
root crop
'swedes maybe' is the definition.
(Swedes are a root vegetable)
'councillor's wearing jumper and vest' is the wordplay.
'councillor' becomes 'cr' (I've seen this in other clues).
'wearing' means one lot of letters goes inside another.
'jumper' becomes 'roo' (I've seen this before).
'and' means one lot of letters go next to another.
'vest' becomes 'top' (type of garment worn as a top).
'roo'+'top'='rootop'
'cr' put within 'rootop' is 'ROOT CROP'.
'for' is the link.
(Other definitions for root crop that I've seen before include "Potatoes or carrots" , "Vegetable" , "Maybe Murphy" , "Swedes, say" , "Tuber, beet, etc" .)