Capital facial hair, Clark! (8)

I believe the answer is:

tashkent

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'capital' is the definition.
(capital of Uzbekistan)

'facial hair clark' is the wordplay.
'facial hair' becomes 'tash' (I've seen this before).
'clark' becomes 'kent' (I can't explain this - if you can you should believe this answer much more).
'tash'+'kent'='TASHKENT'

Can you help me to learn more?

(Other definitions for tashkent that I've seen before include "Uzbek capital" , "Uzbek city on the old Silk Road" , "somewhere in Asia" , "Capital of Uzbekistan" , "Central Asian capital" .)

I've seen this clue in The Independent.

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