I've still got a few left to complete this crossword and would appreciate any help
7d Dogs eg back in Helsinki ?s?? 16a Undersea link for fish, no u-turn made inside ??r?t?n?e? 17a Schoolgirl back in the White House ???i? 19a Silver track rpond Druid eg ?a?a? 22a Pungent scent first made by river m?s? 25a Soften copper on his round ???t?o? 31a Company do ?a?t? 51d Drink with cast about to go wrong s?e?r?