Yes, it was a great result -
9 - 'School' is an anagram indicator and the 'centres' of the two words (1+2 letters) go around the edges of the anagram part.
17 abbrev for 'Irish' inside (3 letter) 50's 'hooligan'
18 'Chooses' is a 7 letter synonym ('if you ...' = 'if you choose') minus the 2 letter abbrev for 'place'