Inspiration found in the bar when drunk (6)
I believe the answer is:
breath
'inspiration' is the definition.
(thesaurus)
'the bar when drunk' is the wordplay.
'when drunk' is an anagram indicator (I've seen this in other clues).
'the'+'bar'='thebar'
'thebar' with letters rearranged gives 'BREATH'.
'found in' acts as a link.
(Other definitions for breath that I've seen before include "Inhale and exhale air" , "Bertha (anag.)" , "Air received and expelled" , "An inhalation and exhalation" , "It is drawn all the time" .)