Pretentious tunes? (4)
I believe the answer is:
airs
'tunes?' is the definition.
(air can mean a piece of music)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for airs that I've seen before include "Ventilates, say grievance" , "songs" , "Broadcasts" , "- - and graces" , "Strain's" .)