1 across. Cold-shoulder – ‘cos I stare (anag). 9 letters.
8 across. Highway network components. 5 letters.
9 across. One’s competing. 7 letters.
10 across. Angry and indignant. 8 letters.
11 across. (Make) a mark. 4 letters.
13 across. Hardly ever. 6 letters.
14 across. (Slang) mouth. 6 letters.
16 across. Hitchhiker’s goal. 4 letters.
17 across. Sea songs – thin seas (anag). 8 letters.
19 across. Measure of voter participation. 7 letters.
20 across. Home to La Scala and the San Siro. 5 letters.
21 across. Warship which escorts larger vessels. 9 letters.