Black neckwear for moles (7)

I believe the answer is:

jetties

'moles' is the definition.
('jetty' can be a synonym of 'mole')

'black neckwear' is the wordplay.
'black' becomes 'jet' (similar in meaning).
'neckwear' becomes 'ties' (I've seen this in another clue).
'jet'+'ties'='JETTIES'

'for' acts as a link.

(Another definition for jetties that I've seen is " Piers".)

I've seen this clue in the Evening Standard.

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