Lethargic boozer claims benefit on time (8)
I believe the answer is:
indolent
'lethargic' is the definition.
(I've seen this before)
'boozer claims benefit on time' is the wordplay.
'boozer' becomes 'inn'.
'claims' indicates putting letters inside.
'benefit' becomes 'dole' (informal term for a state benefits).
'on' is a charade indicator (letters next to each other).
'time' becomes 't' (abbreviation).
'inn' enclosing 'dole' is 'indolen'.
'indolen'+'t'='INDOLENT'
(Other definitions for indolent that I've seen before include "Lazy, disinclined to work" , "Disinclined to exertion or work" , "Making no effort" , "Disinclined to exert oneself" , "Work-shy" .)