Bro starts to look uncomfortable in karate outfit (5)
I believe the answer is:
luigi
'bro' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?
'starts to look uncomfortable in karate outfit' is the wordplay.
'starts to' says to take the initial letters.
'karate outfit' becomes 'gi' (I can't justify this - if you can you should believe this answer much more).
The initial letters of 'look uncomfortable in' is 'lui'.
'lui'+'gi'='LUIGI'
Can you help me to learn more?
(Other definitions for luigi that I've seen before include "- Pirandello, Italian author" , "-- Boccherini; -- Pirandello" , "Pirandello perhaps" .)