Approach ace opponent taking runs (7)
I believe the answer is:
arrival
'approach' is the definition.
(thesaurus)
'ace opponent taking runs' is the wordplay.
'ace' becomes 'a'.
'opponent' becomes 'rival' (I've seen this before).
'taking' is an insertion indicator.
'runs' becomes 'r' (cricket abbreviation).
'rival' enclosing 'r' is 'rrival'.
'a'+'rrival'='ARRIVAL'
(Other definitions for arrival that I've seen before include "The reaching of one's destination" , "Advent" , "Attainment of destination" , "Appearance, entrance" , "Coming - comer" .)