Runs into club causing terror (4)
I believe the answer is:
brat
'terror' is the definition.
(both can mean a misbehaving child)
'runs into club' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'into' means one lot of letters goes inside another.
'club' becomes 'bat' (as in sporting equipment).
'r' inserted into 'bat' is 'BRAT'.
'causing' is the link.
(Other definitions for brat that I've seen before include "annoying young fellow" , "Mervyn -- (Titus Groan)" , "A spoiled badly-behaved child" , "Brash young type" , "An obnoxious or spoiled child" .)