King is unusually good sport (6)

I believe the answer is:

skiing

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'good sport' is the definition.
'skiing' can be an answer for 'sport' (I've seen this before). I am not certain of the 'good' bit.

'king is unusually' is the wordplay.
'unusually' is an anagram indicator.
'king'+'is'='kingis'
'kingis' with letters rearranged gives 'SKIING'.

Can you help me to learn more?

(Other definitions for skiing that I've seen before include "going downhill, perhaps" , "going downhill fast" , "Mountain sport" , "Travelling over snow on runners" , "Winter sports" .)

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

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