Crossword Genius

Crazy way to score a goal at soccer (3,4,4)

Ross

I believe the answer is:

off ones head

I'm a little stuck... Click here to teach me more about this clue!

'goal at soccer' is the definition.
I know nothing about this answer so I can't judge whether this works.

'crazy way to score a' is the wordplay.
I cannot quite understand how this works, but
'way' could be 's' (Compass direction - South) and 's' is found within the answer.
'a' could be 'one' and 'one' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for off ones head that I've seen before include "Cap in hand is so" , "deranged" , "wasted" .)

I've seen this clue in The Globe and Mail.
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