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' is a reversal indicator.
'annes' in reverse letter order is 'SENNA'.
'at' is the 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" .)