Crossword Genius

Low-cost airline once involving Moss — surprisingly, it's unprofitable (9)

Ross

I believe the answer is:

lossmaker

'it's unprofitable' is the definition.
(I know that lossmakers are unprofitable)

'low-cost airline once involving moss surprisingly' is the wordplay.
'low-cost airline once' becomes 'laker' (Laker Airways, former airline).
'involving' means one lot of letters goes inside another.
'surprisingly' indicates anagramming the letters (a surprising ordering of the letters).
'moss' anagrammed gives 'ossm'.
'laker' enclosing 'ossm' is 'LOSSMAKER'.

I've seen this clue in The Guardian.
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