Move furtively; telltale (5)

I believe the answer is:

sneak

This clue is a double definition.

'move furtively' is the first definition.
(I've seen this before)

'telltale' is the second definition.
(I've seen this before)

(Other definitions for sneak that I've seen before include "thief" , "Creep" , "Underhanded tell-tale" , "To go stealthily" , "Steal" .)

I've seen this clue in The Times.

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