The slight possibility of being away from work? (3,6)
I believe the answer is:
off chance
'the slight possibility' is the definition.
(I've seen this in another clue)
'being away from work?' is the wordplay.
'being away from' becomes 'off' (I've seen this before).
'work?' becomes 'chance' (chance is a kind of work).
'off'+'chance'='OFF-CHANCE'
'of' acts as a link.
(Other definitions for off chance that I've seen before include "Remote possibility" , "Not much likelihood" , "Just a slight possibility" , "Vague possibility" .)