Park keeper managed to get over bug mostly (6)
I believe the answer is:
ranger
'park keeper' is the definition.
(I've seen this before)
'managed to get over bug mostly' is the wordplay.
'managed to get' becomes 'ran' (I've seen this in other clues).
'over' shows that the letters should be reversed in order.
'bug mostly' becomes 'reg' (I can't explain this - if you can you should give a lot more credence to this answer).
'reg' written backwards gives 'ger'.
'ran'+'ger'='RANGER'
Can you help me to learn more?
(Other definitions for ranger that I've seen before include "Rover" , "Forestry official" , "Forest official" , "park-keeper" , "Forest defender" .)