Having, myself, got fifty on "Tropical Fruit" (5)
I believe the answer is:
melon
'tropical fruit' is the definition.
'melon' can be an answer for 'fruit' (type of fruit). I'm unsure of the 'tropical' bit.
'having myself got fifty on' is the wordplay.
'having' becomes 'on' (I can't explain this - if you can you should give a lot more credence to this answer).
'myself' becomes 'me'.
'got' is a charade indicator (letters next to each other).
'fifty' becomes 'l' (Roman numeral).
'on' is a charade indicator (letters next to each other).
'me' put next to 'l' is 'mel'.
'on' after 'mel' is 'MELON'.
Can you help me to learn more?
(Other definitions for melon that I've seen before include "Edible gourd" , "Sweet juicy gourd" , "Sweet juicy fruit" , "Large vine fruit" , "Member of the gourd family" .)