1: Love affair for one like Othello, we hear (5)
2: Add a letter to get the smell of fish (5)
4: Behind and down and out (3)
5: Building for owl and treble changes? (4,5)
6: Two daughters involved in sales of riding equipment (7)
8: Draw a stomach uprising (3)
9: A girl in distress, sought by knights (5)
13: Requires five kills, or a single accurate shot. (3)
14: Sounds like a bright child (3).
16: Young chap gets a slice of fish (9)
17: Author and actress receiving gold choker, originally (7)
19: Bumped into yours truly at junction (3).
20: Perfect counter-spy equipment (3)
21: Dark mysterious thing (5)
23: I hear mantas and surface (5)
24: Vicar regularly outdated technology (1.1.1.)
25: Content little rest for the painter (5)
27: Short bloke quietly escaped seaweed (3)