Amber perhaps about to stray from path (5)
I believe the answer is:
resin
'amber perhaps' is the definition.
(amber is a kind of resin)
'about to stray from path' is the wordplay.
'about' becomes 're' (common abbreviation for 'with reference to').
'to stray from path' becomes 'sin'.
're'+'sin'='RESIN'
(Other definitions for resin that I've seen before include "Sticky stuff as from pine tree" , "It exudes from pines" , "Elemi, for example" , "eg Rosin" , "viscous material" .)