Printer coloured fluid black (3-3)
I believe the answer is:
ink-jet
'printer' is the definition.
(ink jet printer is a kind of printer)
'coloured fluid black' is the wordplay.
'coloured fluid' becomes 'ink'.
'black' becomes 'jet' (similar in meaning).
'ink'+'jet'='INK-JET'
I've seen this clue in The Telegraph.
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