18d) Tissue securing end od deltoid in part of joint (6) no letters
20a) You may get it starting out by eating some eclairs.(5) O?E??
25a) Wind swirls on Corsica, not a northerly (7) ????C??
29a) Notice with small squares examined at random (4-7) S??? C?????D
All help greatly appreciated
18d tendon (D in tenon (type of joint in wood))
20a obese (first letters of Out By Eating Some Eclairs)
25a sirocco (anag. "on corsica" - A N[ortherly]).
29d spot-checked (spot [notice] + checked [with small squares])