@marglm,
39a. Calcium, nitrogen and tin (3) CAN
10d. Confused, pedestrians ran off to Dodge (8) SIDESTEP
(anng PEDESTRIANS minus RAN)
14a. Longed for private eye to take on Flanders ((5) PINED
(re Ned Flanders?Simpsons)
17a. Sales of gold in cost explosion (8) AUCTIONS (anng AU + IN +COST)