Vital Geordie heads for Fleet Street? (6)
I believe the answer is:
needed
'vital' is the definition.
(I've seen this in another clue)
'geordie heads for fleet street?' is the wordplay.
I cannot really understand how this works, but
'geordie' could be 'ne' (Geordies are from Tyneside in the North East) and 'ne' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for needed that I've seen before include "Required something essential" , "'Wanted, required (6)'" , "Was in want of" , "Essential; called for" , "Lacked something essential" .)