@batty,
Don't know 53a (possibly INDUCTS?) or 51a, but the others are:
43d endless glacier could be rerouted from scotland or ireland g?e???
GAELIC
51a to drum up custom is therefore within law ?o?????
49d truck rally? 4/2 ???k up
PICK UP
53a gave talk on sweet little bathroom ?n?u?t?
59d exercising the troops is boring! ?????ing
DRILLING
62a artless bartender on a drinking bout ?e?d??
BENDER