Longed for a big chunk of cheese? (5)
I believe the answer is:
ached
'longed' is the definition.
('ache' can be a synonym of 'long')
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for ached that I've seen before include "suffered" , "Throbbed" , "Did long" , "Had a continuous pain" , "Felt a dull pain" .)