Wearing sandals on vacation, remove socks (6)
I believe the answer is:
swipes
'socks' is the definition.
(I've seen this before)
'wearing sandals on vacation remove' is the wordplay.
'wearing' means one lot of letters goes inside another.
'on vacation' means to remove the middle letters.
'remove' becomes 'wipe' (I've seen this in another clue).
'sandals' with its middle removed is 'ss'.
'ss' placed around 'wipe' is 'SWIPES'.
(Other definitions for swipes that I've seen before include "completes transaction with credit card" , "Sweeping motions" , "bad beer" , "Hits with a swinging blow, or steals" , "socks" .)