Stop striking to tackle branch (5)
I believe the answer is:
sprig
'branch' is the definition.
(I know that branch can be written as sprig)
'stop striking to tackle' is the wordplay.
'stop striking' becomes 'sp' (I am not sure about this - if you are sure you should believe this answer much more).
'to tackle' becomes 'rig' (I've seen this in other clues).
'sp'+'rig'='SPRIG'
Can you help me to learn more?
(Other definitions for sprig that I've seen before include "Shoot - twig" , "Stem or spray" , "piece of holly" , "Youth" , "Small branch or shoot" .)