Ponder, as referee, about extra time (8)

I believe the answer is:

meditate

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'ponder' is the definition.
(I know that ponder can be written as meditate)

'referee about extra time' is the wordplay.
'referee' becomes 'mediate' (referee can mean to mediate or moderate).
'about' means one lot of letters goes inside another.
'extra time' becomes 't' (abbreviation. I am not sure about the 'extra' bit.).
'mediate' placed around 't' is 'MEDITATE'.

'as' acts as a link.

Can you help me to learn more?

(Other definitions for meditate that I've seen before include "Focus one's mind for a period for spirituality or relaxation" , "Think deeply and quietly" , "Cogitate" , "Relax mentally" , "Muse" .)

I've seen this clue in The Guardian.

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