Thespian has keys to lock (7)

I believe the answer is:

actress

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'thespian' is the definition.
(actress is a kind of thespian)

'keys to lock' is the wordplay.
'keys to' becomes 'ac' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'lock' becomes 'tress' (both can mean a piece of hair).
'ac'+'tress'='ACTRESS'

'has' is the link.

Can you help me to learn more?

(Other definitions for actress that I've seen before include "eg Emma Thompson" , "Female thespian" , "dame on stage?" , "Garland perhaps" , "Stage performer" .)

I've seen this clue in The Daily Express.

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