Slide off and move furtively (5)
I believe the answer is:
sidle
'move furtively' is the definition.
(I've seen this in another clue)
'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 "Slink, creep, sneak" , "Move in furtive or timid manner" , "Edge along furtively" , "steal" , "Walk crabwise" .)