Quickly disheartened Solomon (4)
I believe the answer is:
soon
'quickly' is the definition.
(I've seen this in other clues)
'disheartened solomon' is the wordplay.
'disheartened' says to hollow out the word (remove centre letters).
'solomon' with its centre removed is 'SOON'.
(Other definitions for soon that I've seen before include "Presently" , "Before long" , "Early, in a short time" , "Willingly" , "Early; readily" .)