Walk furtively and slide off (5)
I believe the answer is:
sidle
'walk furtively' is the definition.
(I've seen this before)
'slide off' is the wordplay.
'off' indicates an anagram.
'slide' is an anagram of 'SIDLE'.
'and' acts as a link.
(Other definitions for sidle that I've seen before include "Move like a crab" , "Inch along" , "'Move sideways, furtively perhaps (5)'" , "Move in furtive or timid manner" , "Isled (anag.)" .)