Aid for gardener lifting the French herb (6)
I believe the answer is:
trowel
'aid for gardener' is the definition.
(tool used by gardeners)
'lifting the french herb' is the wordplay.
'lifting' says the letters should be written backwards.
'the french' becomes 'le' ('the' in French).
'herb' becomes 'wort' (wort is a kind of herb).
'le'+'wort'='lewort'
'lewort' written backwards gives 'TROWEL'.
(Other definitions for trowel that I've seen before include "Gardener's scoop" , "Small spade" , "Beaten egg dish" , "Hand tool for scooping or spreading" , "Platsterer's tool" .)