Looks composed (4)
I believe the answer is:
airs
'looks' is the definition.
(I've seen this in other clues)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for airs that I've seen before include "'Tunes, melodies (4)'" , "Arrogance" , "Pretentiousness" , "Ventilates or tunes" , "Haughty affectation" .)