Plant can drink gallon that's drained into land (8,6)
I believe the answer is:
stinging nettle
'plant can' is the definition.
'stinging nettle' can be an answer for 'plant' (I have seen 'Common plant ' mean 'stinging nettle' so perhaps 'plant' could also mean 'stinging nettle'). I am unsure of the 'can' bit.
'drink gallon that's drained into land' is the wordplay.
I cannot quite understand how this works, but
'drink' could be 'gin' (gin is an alcoholic drink) and 'gin' is present in the answer.
'gallon' could be 'g' (abbreviation for the unit of liquid) and 'g' is found within the answer.
'into' could be 'in' and 'in' is found in the answer.
'land' could be 'net' (I've seen this before) and 'net' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for stinging nettle that I've seen before include "Plant (Urtica)" , "Common plant" , "Common weed" .)