Dude, try fruit (5)
I believe the answer is:
mango
'fruit' is the definition.
(type of fruit)
'dude try' is the wordplay.
'dude' becomes 'man' (dude can informally mean a man).
'try' becomes 'go' (both can mean an attempt).
'man'+'go'='MANGO'
(Other definitions for mango that I've seen before include "Once exotic fruit" , "Fleshy tropical fruit" , "Large oval tropical fruit" , "Fruit, often in chutney" , "fruit tree" .)