Crossword Genius

Southern Canadian rock group on downward trajectory (5)

Ross

I believe the answer is:

scree

'rock group on downward trajectory' is the definition.
(scree means loose stones on a slope)

'southern canadian' is the wordplay.
'southern' becomes 's' (abbreviation).
'canadian' becomes 'Cree' (the Cree are indigenous to Canada).
's'+'cree'='SCREE'

(Other definitions for scree that I've seen before include "Debris at the foot of a cliff" , "Loose stones on mountain slope" , "Safeguard" , "Loose shifting stones" , "Loose stones around a mountain" .)

I've seen this clue in The Independent.
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