Unexpectedly struggled with this one, and am left with a few I can't seem to parse. Wordplay explanations would be appreciated.
4d "Using coercive methods in the nursery (7)"
answer is FORCING, so def = "using coercive methods"
19d "A practice that attracts unusual interest (5)"
answer is USURY, so def = "interest"
22a "It's healthy to do some plumbing (5)"
answer is SOUND, so def = "it's healthy"