Crossword Genius

Somehow off to a nasty dance for team building competition? (7,8)

Ross

I believe the answer is:

fantasy football

'team building competition?' is the definition.
(football-based pastime)

'somehow off to a nasty dance' is the wordplay.
'somehow' indicates an anagram.
'dance' becomes 'ball' (ball is a kind of dance).
'off'+'to'+'a'+'nasty'='offtoanasty'
'offtoanasty' with letters rearranged gives 'fantasyfoot'.
'fantasyfoot'+'ball'='FANTASY FOOTBALL'

'for' acts as a link.

(Another definition for fantasy football that I've seen is " management game".)

I've seen this clue in The Guardian.
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