Heard contraption can fit in US actor (6,5)

I believe the answer is:

martin sheen

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

'us actor' is the definition.
(I've seen this before)

'heard contraption can fit' is the wordplay.
I cannot quite see how this works, but
'can' could be 'tin' (both are metal containers) and 'tin' is located in the answer.
This explanation may well be incorrect...

'in' is the link.

Can you help me to learn more?

(Another definition for martin sheen that I've seen is " US actor".)

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

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