Approach ace opponent taking runs (7)
I believe the answer is:
Here is my best explanation:
'approach' is the definition.
'ace opponent taking runs' is the subsidiary indication.
'ace' becomes 'a'.
'opponent' becomes 'rival' (I've seen this before).
'taking' means one lot of letters goes inside another.
'runs' becomes 'r' (cricket abbreviation).
'rival' enclosing 'r' is 'rrival'.
(Other definitions for arrival that I've seen before include "The A in ETA", "Achievement of destination", "Reaching a destination", "Appearance, entrance", "The reaching of one's destination", "achievement", "Appearance (at a destination)", "Attainment of destination", "Advent" and "Act of coming".)