Can Euro trip make up for Commonwealth in the Caribbean? (6,5)

I believe the answer is:

puerto rican

I'm a little stuck... Click here to teach me more about this clue!

'commonwealth in the caribbean?' is the definition.
'puerto rican' can be an answer for 'caribbean?' (Puerto Rico is a Caribbean island). I'm unsure of the 'commonwealth in the' bit.

'can euro trip make up' is the wordplay.
'make up' indicates anagramming the letters.
'can'+'euro'+'trip'='caneurotrip'
'caneurotrip' anagrammed gives 'PUERTO RICAN'.

'for' is the link.

Can you help me to learn more?

(Other definitions for puerto rican that I've seen before include "Caribbean from San Juan, perhaps" , "Islander" .)

I've seen this clue in the Sydney Morning Herald.

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