Something a hairdresser gets little call for? (7)

I believe the answer is:

ringlet

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'something a hairdresser gets little' is the definition.
I can't judge whether this defines the answer.

'call for?' is the wordplay.
'call' becomes 'ring' (telephone call).
'for?' becomes 'let' (I can't justify this - if you can you should give a lot more credence to this answer).
'ring'+'let'='RINGLET'

Can you help me to learn more?

(Other definitions for ringlet that I've seen before include "Long curl of hair" , "A curl - kind of tingler" , "Bit of hair" , "Cluster of hair" , "A long tubular curl" .)

I've seen this clue in the Evening Standard.

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