Exciting game at the plant (3-3,5)
I believe the answer is:
red-hot poker
'the plant' is the definition.
(red-hot poker is a kind of plant)
'exciting game' is the wordplay.
'exciting' becomes 'red hot' (I've seen this before).
'game' becomes 'poker' (poker game is a kind of game).
'redhot'+'poker'='RED-HOT POKER'
'at' acts as a link.
(Other definitions for red-hot poker that I've seen before include "Flower (found in the grate?)" , "Flower (just out of the fire?)" , "Garden plant" .)