Titanic's crew finally jumping (8)

I believe the answer is:

whopping

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'titanic's' is the definition.
Both the answer and definition are adjectives. Maybe there's a link between them I don't understand?

'crew finally jumping' is the wordplay.
'finally' indicates one should take the final letters.
'jumping' becomes 'hopping' (hopping is a kind of jumping).
The last letter of 'crew' is 'w'.
'w'+'hopping'='WHOPPING'

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(Other definitions for whopping that I've seen before include "Gigantic" , "Huge" , "Very large" , "Enormous" .)

I've seen this clue in The Times.

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