Going out of turn, Bert upsets the blighter! (5)
I believe the answer is:
brute
'going' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?
'out of turn bert upsets the blighter' is the wordplay.
'out' indicates putting letters inside.
'of turn' indicates an anagram (I've seen 'turns' mean this).
'upsets the blighter' becomes 'u' (I can't explain this - if you can you should give a lot more credence to this answer).
'bert' anagrammed gives 'brte'.
'brte' placed around 'u' is 'BRUTE'.
Can you help me to learn more?
(Other definitions for brute that I've seen before include "Wild animal" , "Nasty person, a real beast" , "Cruelly rapacious person" , "Savage person" , "Vicious type" .)