Staff leave some tropical fruit (5)
I believe the answer is:
mango
'some tropical fruit' is the definition.
(I've seen this before)
'staff leave' is the wordplay.
'staff' becomes 'man' (as in staffing or manning a particular place).
'leave' becomes 'go'.
'man'+'go'='MANGO'
(Other definitions for mango that I've seen before include "Asian fruit" , "Fruit, often in chutney" , "fruit-tree" , "Fleshy tropical fruit" , "Tropical fruit, its pickle" .)