Special effects brought up in Zelig comedy (3)

I believe the answer is:

cgi

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'special effects brought' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'up in zelig comedy' is the wordplay.
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'in' indicates a hidden word.
'igc' can be found hidden inside 'zelig comedy'.
'igc' in reverse letter order is 'CGI'.

Can you help me to learn more?

(Another definition for cgi that I've seen is " Film special effects".)

I've seen this clue in The Irish Times.

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