Rough and clumsy, starts on a seafood (6)

I believe the answer is:

oafish

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'rough and clumsy' is the definition.
I can't judge whether this defines the answer.

'starts on a seafood' is the wordplay.
'starts' means to remove the last letter.
'seafood' becomes 'fish' (fish is a kind of seafood).
'on' with its final letter taken away is 'o'.
'o'+'a'+'fish'='OAFISH'

Can you help me to learn more?

(Other definitions for oafish that I've seen before include "Loutish" , "Stupid, boorish" , "having poor manners" , "Like a lout" , "In the manner of a clumsy and stupid person" .)

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

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