Jab with a finger (4)

I think it could be either:

Which length description are you looking for?:

4,2

poke

'jab with a finger' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for poke that I've seen before include "bag" , "Thrust forward; sack" , "Nudge; a bonnet" , "Probe with stick" , "Jab or prod" .)

I've seen this clue in the USA Today, The Sun and the Newsday.

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