Pole needed to use ATM (3)

I believe the answer is:

I believe this is a double definition.

'pole' is the first definition.
(thesaurus)

'needed to use atm' is the second definition.
(a PIN number is needed to use an ATM)

(Other definitions for pin that I've seen before include "Fastener; brooch" , "Fastener; skittle" , "Secure" , "form of identification" , "Badge" .)

I've seen this clue in The Times.

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