Crossword Genius

Sailor not trained for hairdressing (9)

Ross

I believe the answer is:

tonsorial

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'sailor not trained for hairdressing' is the definition.
I can't tell whether this defines the answer.

'sailor not trained' is the wordplay.
'trained' is an anagram indicator (to train can mean to grow something into a shape).
'sailor'+'not'='sailornot'
'sailornot' with letters rearranged gives 'TONSORIAL'.

Can you help me to learn more?

(Other definitions for tonsorial that I've seen before include "for barber" , "using scissors for work?" , "Barber's" .)

I've seen this clue in The Telegraph.
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