Curl (7)
I believe the answer is:
ringlet
'curl' is the definition.
(I know that curl can be written as ringlet)
This is the entire clue.
(Other definitions for ringlet that I've seen before include "A curl - kind of tingler" , "Cluster of hair" , "sort of lock" , "Curled lock of hair" , "Curl of hair; butterfly" .)