Polish bilingual Brendan follows in US city (3,5)
I believe the answer is:
san diego
'us city' is the definition.
(San Diego is a city in California)
'polish bilingual brendan follows' is the wordplay.
I cannot really see how this works, but
'polish' could be 'sand' (to polish or sand down) and 'sand' is found within the answer.
'brendan' could be 'i' (where the crossword setter is 'Brendan') and 'i' is found in the answer.
The remaining letters 'ego' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for san diego that I've seen before include "US city" , "California naval port" , "Pacific port" , "Southern California naval base" , "Calif. naval base" .)