Sticky secretion (5)
I believe the answer is:
resin
'sticky secretion' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for resin that I've seen before include "Fiddler's need" , "Glue" , "Rinse out this substance from trees" , "Sap product" , "Synthetic compound" .)