Inspiration from the bar, drunk! (6)
I believe the answer is:
breath
'inspiration' is the definition.
(I've seen this in another clue)
'the bar drunk' is the wordplay.
'drunk' is an anagram indicator.
'the'+'bar'='thebar'
'thebar' with letters rearranged gives 'BREATH'.
'from' is the link.
(Other definitions for breath that I've seen before include "Inhale and exhale air" , "It is drawn all the time" , "Air drawn in and expelled out" , "Bertha (anag.)" , "from which inspiration may be drawn" .)