Slow and clumsy boat capsized though! (3)

I believe the answer is:

tub

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

'slow and clumsy boat' is the definition.
I can't tell whether this defines the answer.

'capsized though' is the wordplay.
'capsized' is a reversal indicator.
'though' becomes 'but'.
'but' in reverse letter order is 'TUB'.

Can you help me to learn more?

(Other definitions for tub that I've seen before include "Plastic container" , "Barrel; boat" , "subject of Jonson's tale" , "Large plant pot" , "Clumsy boat" .)

I've seen this clue in The Sun.

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