Across:
   1,9,12. We that never fit see tortuous 27 smarts? (4 5 3 5)
   6. Dull comrade embraces model (5)
   9. see 1
  10. Very French death in the wrong place (11)
  11. Draws rare deal in reverse (9)
  12. see 1
  13,14.  see 1dn
  16. Pulls rank above the law? (9)
  18. Profundity of the professional development material (5)
  19. The pointy bit has a right stench about it (5)
  21,27. Charity do for looking 11 lets us be 1 9 12 (7 2 9)
  24. Wild roar tells me it could flatten me (11)
  25. Too much ecstasy in such a composition (3)
  26. Depicted as gaunt (5)
  27. see 21
Down:
   1,13ac,14ac. Ancient history of a river perhaps (5 5 3 6)
   2. Split desk in order to confuse (9)
   3. Peace-loving want IRA out (7)
   4. Time with prince belonging to others (5)
   5. Get back with gang in topless dress (9)
   6. Therapist regrets Sam's return (7)
   7. How to think about a foolish undertaking? (5)
   8. Tie height adjusted for senior's birthday party (9)
  13. Crazy do opens up with noone objecting (9)
  14. The occupant collects cash blotto - hot stuff! (9)
  15. Quick swim with high and very skimpy bathers yields "oh!" "ay!" etc. (9)
  17. Routine troops follow with respect to US soldier (7)
  18. Strange meds for changes in shape (7)
  20. Production of nothing for each one (5)
  22. Zany loner provides modern material (5)
  23. Some boats are fast (5)