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Decoder's quarrel heading for prolonged strike (3-3,3)

Ross

I believe the answer is:

set-top box

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'decoder's' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'quarrel heading for prolonged strike' is the wordplay.
'quarrel' becomes 'set to' (a set-to is a confrontation or disagreement).
'heading for' says to take the initial letters.
'strike' becomes 'box'.
The first letter of 'prolonged' is 'p'.
'setto'+'p'+'box'='SET-TOP BOX'

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