Plant notice: "No men allowed around stores" (7)
I believe the answer is:
anemone
'plant' is the definition.
(anemone is a kind of plant)
'notice no men allowed around stores' is the wordplay.
'stores' indicates a hidden word.
'around' shows that the letters should be reversed in order.
'enomena' can be found hidden inside 'notice no men allowed'.
'enomena' back-to-front is 'ANEMONE'.
(Other definitions for anemone that I've seen before include "White woodland flower" , "Plant of the buttercup family with brightly coloured flowers" , "Plant; sea creature" , "Plant of the buttercup family - one name (anag)" , "Sea plant or garden flower" .)