Bristol City's top worn by an international giant (7)
I believe the answer is:
titanic
'giant' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for titanic that I've seen before include "Film success (1997) - ship disaster (1912)" , "Gigantic like doomed ocean liner" , "Of enormous size, like the stricken liner" , "Ill-fated vessel" , "Twenty one [SHIP]" .)