Publicity for show guaranteed (8)
I believe the answer is:
exposure
'publicity' is the definition.
(I've seen this before)
'show guaranteed' is the wordplay.
'show' becomes 'expo' (I've seen this before).
'guaranteed' becomes 'sure' (I've seen this in other clues).
'expo'+'sure'='EXPOSURE'
'for' acts as a link.
(Other definitions for exposure that I've seen before include "Uncovering" , "being unmasked" , "Act of laying open or bare" , "Vulnerability; photograph" , "The harmful effects on the body of extreme cold" .)