Perform for that misguided brute Thomas! (7)
I believe the answer is:
'thomas' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's an association between them I don't understand?
'perform for that misguided brute' is the wordplay.
'perform' becomes 'do' (both can mean complete an action).
'for' is a charade indicator (letters next to each other).
'that misguided' indicates anagramming the letters (I've seen this in other clues).
'brute' is an anagram of 'ubter'.
Can you help me to learn more?
(Other definitions for doubter that I've seen before include "E.g. St Thomas" , "one such as Thomas" , "One who is not sure" .)