Beaten by the last corner - as usual! Please help.
45D Sceptically, like a philosopher (6) -S-A--
48D Piece of information union used in current stoppage (5) D-T--
55A I'm interrupting drunk half-heartedly and in trepidation (7) ----D-Y
56A Son grew up, turning into an artist (5) L-G-S
Thank you very much.