Wild rose, for example, on worker in queue (9)
I believe the answer is:
eglantine
'wild rose' is the definition.
(I've seen this before)
'example on worker in queue' is the wordplay.
'example' becomes 'eg'.
'on' is a charade indicator (letters next to each other).
'worker' becomes 'ant' (worker is a type of ant).
'in' indicates putting letters inside.
'queue' becomes 'line' (I've seen this before).
'ant' inserted into 'line' is 'lantine'.
'eg'+'lantine'='EGLANTINE'
'for' is the link.
(Other definitions for eglantine that I've seen before include "Inelegant (anag.); wild rose" , "Sweet brier" , "Strangely inelegant scented plant" , "Milton's honeysuckle" , "Rose, growing wild" .)