Well I thought I had all the answers (with a lot of help):-
CANDID CAMERA SHY
THIRD DEGREE COURSE
GAME WARDEN ASSISTED
SECOND FIDDLE STICKS
LABOUR SAVING FACE
HIDDEN TALENT SCOUT
YELLOW HAMMER DRILL
SWEET SHERRY TRIFLE
BUS GARAGE SALE
ROYAL BALLET SHOES
So I got the letters...CRAIITMHAT...clue is subject taught in school...I thought it was arithmetic...but I don't think there is two "A"s in it! Although my spelling isn't brilliant!