21d) Scientist welcomes Welsh urban development (3,4) N?????N
22a) Deep layer les away (3) S??
23d) Fisherman's right behind corner (6) no letters
25a) Following blind sycophantic behaviour (7) ???I??
28a) Whitewash rebuilt counter (7) T???N??
Many thanks in advance for your help.
Thank you again to all and Good luck. Can you tell me the answer please to 26 across if 3 letters N?E is it NEE (Clue: Once called number with ease , say>)