In case you don't have it in front of you,here the clues:
22a Parking topless large figure in extra seat:OH I'VE GOT IT NOW OF COURSE/Pillion!!!
15d:Something scored by Ian,perhaps?5,5 I have P???? ?I??? Am no longer in touch with the most famous British Ians,I'm afraid,supposing that's the reason for my cluelessness!