Anne’s back at the plant (5)
I believe the answer is:
senna
'the plant' is the definition.
The answer is an example.
'anne's back' is the wordplay.
'back' says the letters should be written backwards.
'annes' reversed gives 'SENNA'.
'at' acts as a link.
(Other definitions for senna that I've seen before include "taking this to speed up motion?" , "Leaf used as laxative" , "Tropical plant with medicinal leaflets" , "given help to get in motion?" , "Laxative from pods" .)