Clue: With roll of fat for one of 27 2 23 (7)
Answer: PROTEUS
Explanation: Definition: one of 27 2 23
PRO (with, as in "are you with me or against me") + reverse of SUET – Proteus is one of Shakespeare's *Two Gentlemen of Verona*, who might be described as "a couple of Veronese swells"