Wrinkle-covered worker seen by, say, plant (9)
I believe the answer is:
eglantine
'plant' is the definition.
The answer is an example.
'wrinkle-covered worker seen by say' is the wordplay.
'wrinkle' becomes 'line' (synonyms).
'covered' indicates putting letters inside.
'worker' becomes 'ant' (worker is a type of ant).
'seen by' is a charade indicator (letters next to each other).
'say' becomes 'eg' (both can mean for example).
'line' enclosing 'ant' is 'lantine'.
'lantine' put after 'eg' is 'EGLANTINE'.
(Other definitions for eglantine that I've seen before include "Inelegant (anag) - plant" , "Milton's honeysuckle" , "Sweetbriar, inelegant in a way" , "Wild rose, sweet briar" , "Inelegant (anag.); wild rose" .)