"What's gotten ___ you?" (4)
I believe the answer is:
into
(Other definitions for into that I've seen before include "A fan of" , "Not I (anag.)" , "Enthusiastic about" , "Fascinated by" , "Two -- six is three" .)
I believe the answer is:
into
(Other definitions for into that I've seen before include "A fan of" , "Not I (anag.)" , "Enthusiastic about" , "Fascinated by" , "Two -- six is three" .)