Across

Fruit of the oak tree (5)
Within which pistons move (9)
A canal for a current of water (7)
10 A wanderer (7)
11 They have slimy bodies and no external shell (5)
13 Annoy persistently (5)
15 A diagrammatic representation (3)
16 Compete for something (3)
17 Small donkey (5)
19 A person's breast or chest (5)
21 Flavorful topping for food (5)
23 Sediment that has settled at the bottom of a liquid (5)
24 A wide-mouthed vessel (3)
25 A youthful male person (3)
26 Goods carried by a large vehicle (5)
28 Yellow oval fruit (5)
29 Marked by smartness in dress and manners (7)
31 Coming into existence (7)
33 Moving toward the east (9)
34 Pretended to be someone or something else (5)

Down

A substance that wears down (9)
Block passage through (7)
The momentary present (3)
Underground chamber (5)
Light Emitting Diode (3)
Lacking experience of life (5)
Places in a grave (7)
A piece of cloth that is left over (5)
12 The expensive dark brown fur of the marten (5)
14 A place that is higher (5)
18 The echo of a pulse of microwave radiation (5)
19 Aromatic herb (5)
20 Soaked in liquid for seasoning; of foods (9)
22 A mythical Greek hero (7)
24 Coveralls worn by children (7)
25 An emblem that signifies your status (5)
26 Rising to a higher point (5)
27 Had possession of (5)
30 Large African antelope (3)
32 Take a small drink (3)