Player's boot is tight (6)
I believe the answer is:
oboist
'player's' is the definition.
(oboe player)
'boot is tight' is the wordplay.
'tight' is an anagram indicator (tight can mean drunk).
'boot'+'is'='bootis'
'bootis' with letters rearranged gives 'OBOIST'.
(Other definitions for oboist that I've seen before include "Player of woodwind instrument of treble pitch" , "Wind player" , "Do I boost the musician?" , "Musician who plays woodwind of treble pitch" , "Instrumentalist" .)