Ok, here we go .....
17a A ridge between furrows,like a row of purls, etc (6)
43a From cocoa bean to wrapped bar, a universally esteemed food etc (9)
6d Word, related to 'grow, wax, as in the Moon, for one's midriff (5)
19d A biodiverse boundary of hawthorn and/or other bushes etc (5)