Lazy? Go short! (7)
I believe the answer is:
workshy
'lazy?' is the definition.
('workshy' can be a synonym of 'lazy')
'go short' is the wordplay.
'go' becomes 'work' (working is a kind of going).
'short' becomes 'shy' (I've seen this in other clues).
'work'+'shy'='WORKSHY'
(Other definitions for workshy that I've seen before include "Inclined to stay at home?" , "Inclined to laziness" , "Disinclined to labour" , "Disinclined to exert oneself - bashful" , "Lazy and idle" .)