Stuck on bottom left hand corner. 16d-In poor condition for record, withdraw from race?Yes (8). ?c?a????. 17d-Shelter mare with bull? that's irregular (8) ?m?r????. 25a-Poet made clear in heartless academy (9) ????r?d?e. 27a-Had strong urge to repair deanery (7) ????n?d. Many thanks for any help.