Crossword Genius

Middle-sized catalogue is the least sought-after (5)

Ross

I believe the answer is:

zlist

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'the least sought-after' is the definition.
I can't tell whether this defines the answer.

'middle-sized catalogue' is the wordplay.
'middle' says to take the centre.
'catalogue' becomes 'list' (a catalogue is a list of items).
The central letter of 'sized' is 'z'.
'z'+'list'='ZLIST'

'is' acts as a link.

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I've seen this clue in The Irish Times.
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