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 not certain 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 believe this answer much more).
'myself' becomes 'me'.
'got' means one lot of letters go next to another.
'fifty' becomes 'l' (Roman numeral).
'on' is a charade indicator (letters next to each other).
'me' put next to 'l' is 'mel'.
'on' put 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" .)