Across
Idle cop somehow to turn back his support? (6,3)
First degree thus fundamental (5)
Bloke needing microphone repair after change of heart (7)
Inexpert fellow invested in gold? Heading for ruin (7)
Boy lied? Not good (3)
Study sounds of birds avoiding northern part of Europe (11)
Business information in current year (6)
Test offered by sequence in exposed cards? (5,3)
Imaginative architectural feature in mind — millions expended (8)
Wrong answer — subsequently repeated in second test (6)
Nothing blocks machine, all wrecked, attaining the dumps (11)
Bill almost crazy to return (3)
Implausibly fast mover on yacht at sea (7)
Instruments, black in appearance mostly (7)
Cheat getting round a new rule (5)
Alpine lake falling short — unknown quantity needed for stability (9)
Down
Questions accessories needed for ballet? (5)
Allow story about Conservative? Breaking news carrying no weight (7)
Hopefully learning many are involved in this legal matter (5,6)
Everybody in staff raised money (6)
Old relative was not happy about rising extravagance (8)
Fashion accessory obtained out of South American city (3)
Visit with estate agent, perhaps, getting invitation to check next option? (3,4)
A city rent is ridiculous? Sure thing (9)
Who's got ready to study? (11)
Self-evident Times article turned up with peculiar expressions I'd ignored (9)
Me, I will participate in most of opportunity to get fitter? (8)
Lithium company beset by wrong element (7)
Seek new skill? Picked up skill, staying in control (7)
A lot of effort to get a new advertising feature (6)
Military accessory at work, requiring billions invested (5)
Arab country offloading Middle East currency (3)
Type letters or click words in the clue