Swap for some extra delights (5)
I believe the answer is:
trade
'swap' is the definition.
(synonyms)
'some extra delights' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'TRADE' is hidden in the letters of 'extra delights'.
'for' is the link.
(Other definitions for trade that I've seen before include "Buy and sell, barter" , "Buy and sell in business" , "Deal - occupation" , "Calling" , "Commercial exchange of goods and services" .)