Across
1 to conceal, hide (4)
3 you (one person) and I, we two, us (4)
6 neck, back of the neck, nape of the neck (2)
8 food (3)
10 Wednesday. (5)
12 to know, know well, be proficient, expert at, competent, fluent (7)
15 to paint (5)
17 morning (3)
18 he, she, it (2)
20 to be spread (4)
21 to beg, pray, request, appeal (4)

Down
1 snow, foam, froth; sugar (4)
2 I, me (2)
4 (particle) Used following e and a verb to indicate continuing action or a continuing state (3)
5 vine of any climbing plant (3)
7 to screen, protect, ward off (7)
9 nine (3)
11 be exhausted, used up (3)
12 to sleep (3)
13 (particle) Used following e and a verb to indicate continuing action or a continuing state (3)
14 bus (4)
15 to erect, establish, fix, elevate on poles (3)
16 iwi (3)
19 (particle) always, regularly, usually (2)