Moneybags = (F/C)AT ('fat cat') w/ FLAW or CLAW (33D: Scratch, say)
17A: *Sound of little feet = P(I/A)TTER ('pitter patter') w/ SLIT or SLAT(2D: Louver feature).THEME: flim-flam - theme answers are two-word phrases where the two words are only one letter apart instead of appearing as two words, the answer appears as one word, and where the one letter is different, both the letter from the first word and the letter from the second word technically work as answers in the down.