Question Author
here are the clues..
23a Word used in radio communication to indicate that the
speaker has finished transmitting and is expecting a response (4)
31a — index; series of alphabetical grooves down the side of some
dictionaries, diaries and address books to facilitate easy reference (5)
54a Eaten since Roman times andpressed for cider, vinegar and
Calvados, England’s national fruit (5)
1d Artist, plantsman, iris-breeder and Lucian Freud’s teacher whose works include Frances Hodgkins, Margaret’s Pots and Autumn Landscape, Suffolk (6)