Shirt Mel's designed without Joy (9)

I believe the answer is:

mirthless

'without joy' is the definition.
('joy' can be 'mirth' (thesaurus) so maybe 'without joy' can be ''mirthless')

'shirt mel's designed' is the wordplay.
'designed' indicates an anagram (designed with the letters).
'shirt'+'mels'='shirtmels'
'shirtmels' with letters rearranged gives 'MIRTHLESS'.

(Another definition for mirthless that I've seen is " Gloomy".)

I've seen this clue in The Independent.

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