Well-deseved smug look al thanks for your input! CONTENT with my solutions, now maybe I can get on with something more productive - at least The Wee S keeps the old brain ticking over and I learn something new each week. maybe I don't remember it but...............
Yes, John. Biped because a bird has two feet........ but also because clue is "Bird gym for 21"...21 = third/third letter of "bird" is "r".
gym = p.e. ......substitute "pe" for "r" and you get biped.
Easier to work out than type!