Poet cuts all that’s irregular to keep uniform (8)

'poet' is the definition.
(I know that Catullus is a poet)

'cuts all that's irregular to keep uniform' is the wordplay.
'that's irregular' indicates an anagram.
'to keep' indicates putting letters inside.
'uniform' becomes 'U' (phonetic alphabet: alpha, bravo, charlie etc.).
'cuts'+'all'='cutsall'
'cutsall' is an anagram of 'catllus'.
'catllus' placed around 'u' is 'CATULLUS'.