ACROSS
1 Frida, Mexican painter and a posthumous 14 for the Chicano Movement (5)
4 In physics, the capacity to do work – in drinks, ‘V’, ‘Red Bull’, ‘Monster’, etc! (6)
9 All kinds of things – “We saw ducks, geese, swans – __ ___ _!” (3,4,2)
10 Taut, rigid, stretched tight (or present, past, pluperfect, conditional, etc) (5)
11 Stir up, literally or figuratively (4)
12 A protagonist such as Zorro, Robin Hood, Xena, Indiana Jones, etc (6,4)
15 “Women who seek to be ___ with men lack ambition.” --Timothy Leary (5)
16 Supplies of (generally non-16 down) material or 4 (9)
17 Describes a biochemical process accompanied by a release of 4 (anagram of “generic ox”) (9)
18 A source of 4 – clean nuclear power, in a…
