Across
1
Due to an oversight – ate TV dinner (anag) (11)
9
Elected head of state (9)
13
Italian astronomer and mathematician, died 1642 (7)
18
Copy (another’s success) (7)
20
Fire-raiser’s crime (5)
21
Fish which breeds in the Sargasso Sea (3)
24
Make happen at the same time (11)
Down
6
I’ve stolen (anag) – knick-knacks (9)
7
Use it to check a surface is horizontal (6,5)
8
Chance (to do something) (11)
19
Established for a particular purpose (2,3)
23
Possessive determiner (3)