1 River Tyne's banks hampering flatfish (8)
2/20A 50% of Noel Coward well received (2,6,7)
3 May perhaps blocking referendum on the EU (5)
4 Vulgar in speech? That nearly is stuff that might inflame (7)
5 A unit of speed or a unit for measuring liquids (7)
6 Plain tiger seen fluttering (9)
7 Books about drinking wine I discarded (6)
8 Piece from Dvorak is hardly jaunty (6)
14 All-star cast assuming me to sense something's not right (5,1,3)
16 On reflection, no form of communication stated a basic plan (8)
17 Not handy to involve us in musical that lacks tempo (8)
19 Beginners in "The Old Horse": on arrival, get yourself organised for a heated workout (3,4)
20 One who produced bars of gold in oldest part of prison? (7)
21 Censured confidential information I lost when going up north (6)
22 Hammond, possibly, supporting May's leadership (6)
25 Feet aim to move to AC/DC (5)