Yearned for a new dongle (6)
I believe the answer is:
longed
'yearned' is the definition.
('long' can be a synonym of 'yearn')
'a new dongle' is the wordplay.
'a new' is an anagram indicator.
'dongle' anagrammed gives 'LONGED'.
'for' acts as a link.
(Other definitions for longed that I've seen before include "Desire strongly" , "Desired strongly" , "Had a yen" , "Pined" , "Hankered, yearned" .)