Maybe squash plant variant? (5)

I believe the answer is:
sport
This clue could be a double definition.
'maybe squash' is the first definition.
'sport' can be an answer for 'squash' (thesaurus). I am not sure about the 'maybe' bit.
'plant variant?' is the second definition.
'sport' can be an answer for 'variant?' (I've seen this in another clue). I am not sure about the 'plant' bit.
Can you help me to learn more?
(Other definitions for sport that I've seen before include "Abnormal" , "Wear, display (an item)" , "Eg, football; fun" , "Fun in ports" , "Games" .)
