29: Anagram of ITS AROUND minus the T - Jurassic Park...
31: Cooler=shortened form of refrigerator; anagram of THEN inside; CHILLS=def
33: Sure=YES after anagram of (o)PERATIVE
36: ALIT inside (t)HE
40: Someone choosing=OPTER. Temper=CALM
3: Triple definition
25: The PM is from a long time ago - William ????
27: Anagram of MASH HOSPITAL ignoring the letters given by the answer to 46acr
30: Anagram of A V D OMEGA in SS
32: Reversal of RE + word for splashes
35: REST=LIE inside anagram of RACES