10a come to maturity (5) r???n
20a movement applied to cricket or tennis ball (7) t?????n
27a mountain that could erupt at any time (6,7) a????? v?l?a??
1d process of legally becoming orphaned child's parent (8) ?d???I?n
7d not checked for printing errors (8) ?n?d?t?d
17d choose, opt for (6,2) s?t?l? ??
18d give the thumbs-up to (7) ???r???
21d lots! (6) ??e???