Time gangster is mad. having magic power? (10)

I believe the answer is:

talismanic

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'magic power?' is the definition.
The definition suggests an adjective which matches the answer.

'time gangster is mad' is the wordplay.
'time' becomes 't' (abbreviation).
'gangster' becomes 'al' (Al Capone).
'mad' becomes 'manic' (I've seen this before).
't'+'al'+'is'+'manic'='TALISMANIC'

'having' is the link.

Can you help me to learn more?

(Another definition for talismanic that I've seen is " like a charm".)

I've seen this clue in The Times.

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