15a. Material such as ‘lead crystal’ developed by George Ravenscroft, a barometer, lens, mirror, tumbler or watch face, or a greenhouse or cold frames collectively. (5)
18a. Link of thread or wool in sewing, embroidery knitting or crochet , or dialect for a shock of corn (6)
44a. Cord of an archery bow, a ‘wire’of a violin, fibrous strip of a runner bean or a series of linked sausages (6)
46d. A register or log, past history, a personal best or an LP. (6)