These four have got me stumped.
12 across Small gardens set at an angle (4 letters) S-E-
22 Down Isn't terribly heartless guy mean? (6 letters) -T-N-Y
17 down It's used to fence in sheep expertly brought up (4 letters) E-E-
Thought it might be EWES but cannot see why
11 down Whip up ordinary Mexican snack (4 letters) -A-O