Wartime craft about to be dismantled

I believe the answer is:

uboat

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

'wartime craft' is the definition.
'U-boat' can be an answer for 'craft' (U-boat is an example). I am not sure about the 'wartime' bit.

'about to be dismantled' is the wordplay.
'to be dismantled' is an anagram indicator.
'about' anagrammed gives 'UBOAT'.

Can you help me to learn more?

(Other definitions for uboat that I've seen before include "Warship" , "What convoy tried to avoid" , "Sub" , "Vessel" .)

I've seen this clue in The Daily Mail.

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