Stuck on a few....
14d. Mixed rye, wheat and potatoes with a lot of meat (7)
{We have M?SH???}
16d. Navy old and old-fashioned? Get knotted! (7)
{We have ???AT??}
31a. Is fat person starting on oil exploration? (8)
{We have SPU??I??}
35a. Constrained by the law on rare instrument (10)
{We have ?ET??E????}
All help appreciated....
M&A