3d. Cause persistent vexation: act as escort before a tipsy social? 4,7,1,5,5 5d. Deliriously in love, cool about lover's first instrument (11) 17ac. US native gets transport to hospital on the part of church (11) 52ac. A brige carrying upper-class to motor sport? (9) 53ac. Deception youth leader associated both with glass of whisky and card game (7-6) 55ac. Girl left opening in fortification (5,4)