Runs in, sees displays (6)
I believe the answer is:
sports
'displays' is the definition.
The answer and definition can be both acts as well as being plural nouns.
Perhaps there's an association between them I don't understand?
'runs in sees' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'in' is an insertion indicator.
'sees' becomes 'spots' (spot can mean to notice or see).
'r' inserted within 'spots' is 'SPORTS'.
Can you help me to learn more?
(Other definitions for sports that I've seen before include "Diversions" , "Football, badminton etc." , "Wears, displays" , "Physical activities" , "Games, fun activities" .)