Crossword Genius

Boring, rubbish kind of humour (7)

Ross

I believe the answer is:

deadpan

I'm a little stuck... Click here to teach me more about this clue!

'kind of humour' is the definition.
Both the definition and answer are adjectives. Maybe you can see a link between them that I don't see?

'boring rubbish' is the wordplay.
'boring' becomes 'dead' (I've seen this in other clues).
'rubbish' becomes 'pan' (both can mean to criticise heavily).
'dead'+'pan'='DEADPAN'

Can you help me to learn more?

(Other definitions for deadpan that I've seen before include "Betraying no emotion" , "Serious-looking" , "Poker-faced" , "Blank" , "Keeping a straight face" .)

I've seen this clue in The Guardian.
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