For 9, 'metal disc's picked up', the 'picked up' = sounds like. The entry sounds like a certain kind of metal disc.
27 Was slightly unfair - it's a very old tennis champ! The 'notice' is a four-letter word, one of the usual three-letter words for 'study' and a three-letter word, abbreviation for 'books' (the last gets reversed, as it's 'around'). I hope this makes sense and helpps!