Quiet call to notice a piece of skirt (4)
I believe the answer is:
ahem
'quiet call to notice' is the definition.
I can't judge whether this defines the answer.
'a piece of skirt' is the wordplay.
'piece of skirt' becomes 'hem' (I can't explain this - if you can you should believe this answer much more).
'a'+'hem'='AHEM'
Can you help me to learn more?
(Other definitions for ahem that I've seen before include "It's said to gain attention; ah, me (anag.)" , "I say!" , "Noise used to attract attention" , "Polite noise to draw attention" , "It attracts attention" .)