9a unusually big old lines cross international zone(8) ??e???z?
5a antelopes smell masking human one(6)??????
10a part of chest to sketch with ruler(6)??????
13a still gasping for air(10) ?r?a??????
7d bandy bird pleaded to go outside(3-6)???-???g?d
8d engineer keen to obtain pink paraffin(8) ??????n?