"In ____ Deep" (3)
I believe the answer is:
too
(Other definitions for too that I've seen before include "To a greater than desirable extent" , "Moreover, in addition" , "Furthermore" , "What a pity!" , "On top - also" .)
I believe the answer is:
too
(Other definitions for too that I've seen before include "To a greater than desirable extent" , "Moreover, in addition" , "Furthermore" , "What a pity!" , "On top - also" .)