Arsenal's "Mr Big" ruined year in a shameful way (14)

I believe the answer is:

embarrassingly

'in a shameful way' is the definition.
(in an embarrassing way)

'arsenal's mr big ruined year' is the wordplay.
'ruined' indicates an anagram.
'year' becomes 'y'.
'arsenals'+'mr'+'big'='arsenalsmrbig'
'arsenalsmrbig' is an anagram of 'embarrassingl'.
'embarrassingl'+'y'='EMBARRASSINGLY'

I've seen this clue in The Independent.

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