Partners' Macintosh USB and screen input (8)

I believe the answer is:

husbands

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

'partners'' is the definition.
(husband is a kind of partner)

'macintosh usb and screen input' is the wordplay.
'HUSBANDS' is hidden within the letters.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for husbands that I've seen before include "They're married" , "Carefully manages" , "mates" , "Married men" .)

I've seen this clue in the Sydney Morning Herald.

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