Nick’s small cloth (5)
'nick's' is the definition.
(I've seen this before)
'small cloth' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'cloth' becomes 'wipe' (piece of cloth used to wipe things down).
(Other definitions for swipe that I've seen before include "Hit; criticism", "Process (credit card); steal (colloq.)", "Paid screws (anag) - plastic", "Steal; pass a card through a reader", "Pass (card) through an electronic reader".)