Trough causing deep trouble in the ship (8)

I believe the answer is:

sheepdip

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'trough' is the definition.
I know nothing about this answer so I can't tell whether this works.

'deep trouble in the ship' is the wordplay.
'trouble' is an anagram indicator.
'in the' means one lot of letters goes inside another.
'deep' anagrammed gives 'eepd'.
'eepd' inserted into 'ship' is 'SHEEPDIP'.

'causing' is the link.

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I've seen this clue in The Irish Independent.

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