Across
1 Consumes food (4) EATS
3 Cuts into bits (8) DISSECTS
9 Root vegetable (7) PARSNIP
10 Appear suddenly (3,2) POP UP
11 Corresponding; proportionate (12) COMMENSURATE
13 Greek mathematician (6) EUCLID
15 Spanish rice dish (6) PAELLA
17 Separately (12) INDIVIDUALLY
20 Pollex (5) THUMB
21 Sad or emotional (7) TEARFUL
22 Extremely accomplished (8) MASTERLY
23 Computer memory unit (4) BYTE
Down
1 Anticipated (8) EXPECTED
2 Monotonous hum (5) THRUM
4 Mischievous (6) IMPISH
5 Occult (12) SUPERNATURAL
6 Wealth (7) CAPITAL
7 Drains of energy (4) SAPS
8 Not capable of being checked (12) UNVERIFIABLE
12 Dark colour that is virtually black (4,4) NAVY BLUE
14 Agrees (7) CONCURS
16 Horizontal supporting beam (6) LINTEL
18 Towering (5) LOFTY
19 Plant stalk (4) STEM