Finally take in hand young becoming quarrelsome (6)
I believe the answer is:
feisty
'quarrelsome' is the definition.
(feisty can mean quick to take offence)
'finally take in hand young' is the wordplay.
'finally' says to take the final letters.
'in' is an insertion indicator.
'hand' becomes 'fist' (hand curled into a fist).
'young' becomes 'y'.
The last letter of 'take' is 'e'.
'e' put inside 'fist' is 'feist'.
'feist'+'y'='FEISTY'
'becoming' is the link.
(Other definitions for feisty that I've seen before include "full of fighting spirit" , "Spirited -- argumentative" , "Spirited and courageous" , "Spiritedly aggressive" , "Spirited; quarrelsome" .)