Old Jack, seen as a rogue at Mile End (4)

I believe the answer is:

cade

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'old jack seen' is the definition.
I can't judge whether this definition defines the answer.

'a rogue at mile end' is the wordplay.
'a rogue' becomes 'cad' (I've seen this before**).
'at' means one lot of letters go next to another.
'end' indicates one should take the final letters.
The final letter of 'mile' is 'e'.
'cad'+'e'='CADE'

'as' is the link.

Can you help me to learn more?

(Other definitions for cade that I've seen before include "Jack --, English rebel" , "Jack -, Kentish rebel" , "Rebel leader" , "Barrel" .)

I've seen this clue in the Evening Standard.

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