1: Flower, large one, set up outside (5)
 4: Praiseworthy naval officer, English, found around boat's prow (9)
 8: Sleep around in sheds (5)
 9: Train sets notwithstanding (9)
 11: Detains stranger as a substitute (7)
 13: Impostor made flanking attack (5)
 14: Ejection of Jack from medieval competition (7)
 15: The French inheritance given up by a former French colony (7)
 17: Little bitty lines on a letter from Athens (7)
 18: Stranger is using and supplying (7)
 19: Disturbance is the robbery (5)
 21: I stand in at queen's inauguration... wow! (7)
 22: Established to trick company editor (9)
 23: Birds in the wilderness (5)
 25: Took a load off awfully thin ledge (9)
 26: Out of context rather more than is necessary (5)