First minister supports outstanding radio station (7,2)

I believe the answer is:

classic fm

'radio station' is the definition.
(Classic FM is a radio station)

'first minister supports outstanding' is the wordplay.
'first minister' becomes 'FM' (abbreviation).
'supports' means one lot of letters go next to another (bottom letters provide a support for the top ones).
'outstanding' becomes 'classic' (classic can mean outstanding or excellent).
'fm' put after 'classic' is 'CLASSIC FM'.

I've seen this clue in The Independent.

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