International show certain to get publicity (8)

I believe the answer is:

exposure

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'publicity' is the definition.
(I've seen this before)

'international show certain' is the wordplay.
'international show' becomes 'expo' (I've seen this before. I am not sure about the 'international' bit.**).
'certain' becomes 'sure' ('sure' can be a synonym of 'certain').
'expo'+'sure'='EXPOSURE'

'to get' is the link.

Can you help me to learn more?

(Other definitions for exposure that I've seen before include "Vulnerability; photograph" , "Risk for Antarctic explorer" , "Unmasking" , "Publicity, or state of being revealed" , "Act of laying open or bare" .)

I've seen this clue in The Telegraph.

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