Across

• 1.

  STRANGELY: ST(R-ANGEL)Y
• 8.

  THEN: TEN(nessee)
• 9.

  ANA: ANA (alternate letters)
• 10.

  AUTOMATON: A(U-TOMATO)N
• 11.

  MITOSIS: MI-TOS-IS ("sot I'm" rev.)
• 12.

  PRIMATE: P(RIM)ATE
• 16.

  REASONS: REASONS (anag.)
• 17.

  CONQUER: CONQUER (homophone)
• 21.

  RAREBITS: R(A-REB)ITS ("stir" rev.)
• 23.

  DRAGNET: DRAGNE-T (anag. + t)
• 26.

  BEANS: BANS(hees)
• 27.

  ALFIE: A-LFIE (a + anag.)
• 29.

  CAJOLE: C(A-J)OLE
• 32.

  SHUN: S(H)UN
• 33.

  OVERRAN: O-V(ERR)AN
• 35.

  TROUT: TRO(U)T
• 37.

  POSTBOX: POST-BOX ("stop" anag.)
• 38.

  PATENT: PATE-N(o)T
• 39.

  ROUE: RUE (double def.)

Down

• 1.

  SAG: SAG (rev.)
• 2.

  THUMPER: TH(UMP)E-R
• 3.

  RETIRE: RETIRE (double def.)
• 4.

  NEMO: NEMO (rev.)
• 5.

  ENTITY: ENTITY (anag.)
• 6.

  LOOSENS: L(O)OSENS (o + anag.)
• 7.

  YANK: YANK (double def.)
• 13.

  MOSQUE: Mo(use)-SQUE(aking)
• 14.

  PANORAMA: PAN(OR)AMA
• 15.

  BOURBONS: B(OUR)-BONS ("snob" rev.)
• 17.

  CORDOBA: CO-RDOBA ("board" anag.)
• 18.

  RETELL: RE-TELL
• 19.

  PARSECS: PARSECS (anag.)
• 20.

  PINEAL: PINE(A)-L
• 22.

  STILE: STILE (homophone)
• 24.

  INURE: INURE (anag.)
• 25.

  LIBRETTO: LI-B-RETTO ("otter" rev.)
• 28.

  ENROBE: ENROB-E (borne rev.)
• 30.

  ONYX: O-N-Y-X
• 31.

  CAPONE: CA-(PO)NE
• 33.

  OOPS: 0-0-P-S (rev.)
• 34.

  NET: N(E)T
• 36.

  TAR: TAR (rev.)