Taciturn, reserved (8)

I believe the answer is:

reticent

This clue is a double definition.

'taciturn' is the first definition.
(similar in meaning)

'reserved' is the second definition.
(synonyms)

(Other definitions for reticent that I've seen before include "Secretive" , "Reserved, retiring" , "Uncommunicative" , "Not wanting to talk" , "Reserved, loath to talk" .)

I've seen this clue in The Mirror.

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