Jet vitamin to famine (5)

I believe the answer is:

black

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'jet' is the definition.
(similar in meaning)

'vitamin to famine' is the wordplay.
'vitamin' becomes 'B' (B vitamin is an example).
'to famine' becomes 'lack' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'b'+'lack'='BLACK'

Can you help me to learn more?

(Other definitions for black that I've seen before include "Served without milk" , "Sort of guard, panther, jack or pudding..." , "(Of coffee) without milk" , "Extremely dark" , "Dirty" .)

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

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