Leaves trip with a lot of pain (7)
I believe the answer is:
spinach
'leaves' is the definition.
(leafy vegetable)
'trip with a lot of pain' is the wordplay.
'trip with' becomes 'spin' (I am not sure about this - if you are sure you should believe this answer much more).
'a lot of' means to remove the last letter (I've seen 'lots of' mean this (the majority of the word)).
'pain' becomes 'ache' (ache is a kind of pain).
'ache' with its last letter taken off is 'ach'.
'spin'+'ach'='SPINACH'
Can you help me to learn more?
(Other definitions for spinach that I've seen before include "leaves on plate?" , "Leaf vegetable" , "Vegetable plant" , "Popeye's strength-giver" , "Leafy vegetable" .)