Leaves lantern-jawed man demonstrating bias (5)

I believe the answer is:

slant

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

'bias' is the definition.
(I know that slant is a more specific form of the action bias)

'leaves lantern-jawed man' is the wordplay.
'SLANT' is hidden in amongst the letters.
But, I am not sure how the hidden word is indicated.

'demonstrating' is the link.

Can you help me to learn more?

(Other definitions for slant that I've seen before include "passing breeze?" , "Lie obliquely" , "Angle; make oblique" , "Deviation from the horizontal" , "Slope - bias" .)

I've seen this clue in The Irish Times.

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