Curling lock of hair (7)
I believe the answer is:
ringlet
'curling lock of hair' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for ringlet that I've seen before include "Curled lock of hair" , "sort of lock" , "A curl - kind of tingler" , "Handy device" , "Curl of hair; butterfly" .)