Stars performing outside Brazilian port (5)
I believe the answer is:
orion
'stars' is the definition.
(Orion is a constellation)
'performing outside brazilian port' is the wordplay.
'performing' becomes 'on' (I've seen this in other clues).
'outside' is an insertion indicator.
'brazilian port' becomes 'rio' (I've seen this before).
'on' going around 'rio' is 'ORION'.
(Other definitions for orion that I've seen before include "Constellation that includes Betelgeuse" , "He hunted" , "Large constellation" , "Constellation - mythological hunter" , "A giant hunter in Greek legend, and a constellation" .)