Went quietly, finally exhibiting little strength (5)
I believe the answer is:
weedy
'exhibiting little strength' is the definition.
I can't judge whether this defines the answer.
'went quietly finally' is the wordplay.
'went' becomes 'weed' ('go' can mean to urinate).
'finally' says to take the final letters.
The final letter of 'quietly' is 'y'.
'weed'+'y'='WEEDY'
Can you help me to learn more?
(Other definitions for weedy that I've seen before include "Thin, puny (colloq.)" , "Underdeveloped" , "like an untended flower bed?" , "Scraggy" , "scrawny" .)