Thought this was fairly straightforward, but put it down and picked it back up later this week and struggling to get back into it. Hints appreciated on:
43a ...one with instrumental record ahead of all others? (9) O?T????N?
34a Test capacitor disregarding small measurement (5) T??E?
22a Fault-finding wench - a sourpuss (4) ????
14a Wait passing around last piece of eclair (6) ??AR??
(there maybe a misprint in the def.)