Friends to slap around (4)

I believe the answer is:

pals

'friends' is the definition.
(I know this)

'slap around' is the wordplay.
'around' is a reversal indicator.
'slap' back-to-front is 'PALS'.

'to' is the link.

(Another definition for pals that I've seen is " Friends".)

I've seen this clue in The Mirror.

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