Perhaps Violet Beauregarde’s second to go back after Wonka’s introduction – monstrous creature! (8)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

Reversal of ( … to go back ) [ FLOWER(an example of which/perhaps is the violet) + 2nd letter of ( …’s second ) “ Beauregarde ” ] placed after ( after ) 1st letter of ( …’s introduction ) “ Wonka ”. And Violet Beauregarde is one of the characters in “Willy Wonka and the Chocolate Factory”, the film adaptation of Roald Dahl’s “Charlie and the Chocolate Factory”.