Quickly drop fruit, having encountered ... (7)
I believe the answer is:
plummet
'quickly drop' is the definition.
'plummet' can be an answer for 'drop' (plummeting is a kind of dropping). I am not certain of the 'quickly' bit.
'fruit having encountered' is the wordplay.
'fruit' becomes 'plum' (plum is a kind of fruit).
'having' is a charade indicator (letters next to each other).
'encountered' becomes 'met' ('meet' can be a synonym of 'encounter').
'plum'+'met'='PLUMMET'
Can you help me to learn more?
(Other definitions for plummet that I've seen before include "Drop sharply" , "fall sharply" , "Descend" , "Fall headlong" , "Drop vertically and fast" .)