A Tad Baffled!
22ac: Boastful type takes night flyer around Uni. (8) I can see the MOuTH but not the BIG for Bigmouth.
26ac: He wrote about most of The Office. (5) E?I?T
18ac: Item of furniture used in Blue Peter - middle part. (4) S?A? I know seat seems obvious but can not match it to the clue.
Thanks
I must admit I find many of the answers a tad dubious these days. I do not mind the clues being tough so long as I can be confident of my answer when I get it! I guess sometimes the compilers get a little too cute.