Face put the other way, it can stick (3)
I believe the answer is:
gum
'it can stick' is the definition.
'face put the other way' is the wordplay.
'face' becomes 'mug' (mug is a kind of face).
'put the other way' shows that the letters should be reversed in order.
'mug' written backwards gives 'GUM'.
(Other definitions for gum that I've seen before include "Chewy stuff, hard to clean away" , "Adhesive for chewing" , "Eg, a eucalyptus" , "Sticky substance and mouth tissue" , "Glue; jelly-like sweet" .)