Seeing red pants with extra zip (9)

I believe the answer is:

energised

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'seeing red pants with extra zip' is the definition.
I can't judge whether this defines the answer.

'seeing red pants' is the wordplay.
'pants' indicates anagramming the letters (UK informal term for 'nonsense' or 'rubbish').
'seeing'+'red'='seeingred'
'seeingred' with letters rearranged gives 'ENERGISED'.

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(Other definitions for energised that I've seen before include "Fired up" , "Gave vitality to" , "Roused" , "Animated" , "Given drive" .)

I've seen this clue in The Guardian.

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