Bush's lad never worried (8)
I believe the answer is:
lavender
'bush's' is the definition.
(lavender is a kind of bush)
'lad never worried' is the wordplay.
'worried' indicates anagramming the letters.
'lad'+'never'='ladnever'
'ladnever' anagrammed gives 'LAVENDER'.
(Other definitions for lavender that I've seen before include "Aromatic shrub related to mint" , "Light bluish-purple" , "Plant with aromatic purple flowers" , "Plant prized for its scent" , "it should smell nice" .)