Crossword Genius

...while showing off another, leaving nothing out (10)

Ross

I believe the answer is:

hotdogging

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'while showing off another leaving nothing out' is the definition.
I can't judge whether this definition defines the answer.

'while showing off another leaving' is the wordplay.
'while showing' becomes 'hotdog' (I can't justify this - if you can you should believe this answer much more).
'off' becomes 'going' (both can mean departing).
'another' becomes 'o' (I've seen this in other clues).
'leaving' indicates named letters should be taken away.
'going' with 'o' taken away is 'ging'.
'hotdog'+'ging'='HOTDOGGING'

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I've seen this clue in The Daily Express.
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