Maybe Lynn pots mountain plant (7)
I believe the answer is:
verbena
'plant' is the definition.
(verbena is a kind of plant)
'maybe lynn pots mountain' is the wordplay.
I cannot quite see how this works, but
'mountain' could be 'ben' (as in Ben Nevis) and 'ben' is located in the answer.
The remaining letters 'vera' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for verbena that I've seen before include "Ornamental pant" , "Vervain (plant)" , "Herbaceous plant" , "Garden plant" , "Ornamental plant with showy flowers" .)