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