Crossword Genius

Unusually bad scoreline is of some importance (12)

Ross

I believe the answer is:

considerable

'of some importance' is the definition.
(I've seen this before)

'unusually bad scoreline' is the wordplay.
'unusually' indicates anagramming the letters.
'bad'+'scoreline'='badscoreline'
'badscoreline' is an anagram of 'CONSIDERABLE'.

'is' is the link.

(Other definitions for considerable that I've seen before include "Major" , "Relatively large" , "Significant" , "worth entertaining?" , "Fairly large or numerous" .)

I've seen this clue in The Independent.
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