Crossword Genius

As a result, player goes after umpire intervening in unfinished argument (9)

Ross

I believe the answer is:

therefore

I'm a little stuck... Click here to teach me more about this clue!

'as a result' is the definition.
(I've seen this before)

'player goes after umpire intervening in unfinished argument' is the wordplay.
I cannot really understand how this works, but
'umpire' could be 'ref' (I've seen this before) and 'ref' is found within the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for therefore that I've seen before include "has a triangular formation in maths?" , "Consequently - for that reason" , "Ergo" , "It follows" , "as result" .)

I've seen this clue in The Hindu.
Want a hint initially instead of a full solution? Install my app