I’ve cut tartan badly — not a pretty sight (12)

I believe the answer is:

unattractive

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'not a pretty sight' is the definition.
I can't tell whether this definition defines the answer.

'i've cut tartan badly' is the wordplay.
'badly' is an anagram indicator (letters in the wrong order).
'ive'+'cut'+'tartan'='ivecuttartan'
'ivecuttartan' with letters rearranged gives 'UNATTRACTIVE'.

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(Other definitions for unattractive that I've seen before include "Ill-favoured" , "Plain" , "Not appealing" , "Repulsive" .)

I've seen this clue in The Times.

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