Sounds like hero is unemployed (4)
I believe the answer is:
idle
'is unemployed' is the definition.
(similar in meaning)
'sounds like hero' is the wordplay.
'sounds like' shows a homophone (sound like).
'hero' becomes 'idol' (I've seen this before).
'idol' is a homophone of 'IDLE'.
(Other definitions for idle that I've seen before include "not working in > lounge" , "Explosive stuff" , "Lazy - unemployed" , "Inactive - lied (anag)" , "lndolent" .)