Yearning to marry cockney (4)
I believe the answer is:
itch
I believe this is a double definition.
'yearning' is the first definition.
(I've seen this in another clue)
'marry cockney' is the second definition.
('hitch' - I've seen this before - said with the 'H' dropped - a cockney accent.)
'to' is the link.
(Other definitions for itch that I've seen before include "that's irritating" , "Impatient desire (colloq.)" , "Constant desire" , "Yen" , "A strong restless desire" .)