Solvers should heed a warning when deducing ten symmetrically placed unclued lights (two of three words and one of two words).

Across

1 Poet entertaining Round Table (5)
4 Together, brutes briefly help the old order (9)
11 Live international back on a roll (6)
12 Sting seen in church right by jetty (7)
15 Oddly enough, Chloe broke priest (5)
16 Noisy dosser needs time out from extreme difficulty (6)
22 Female tailing former PM, an old chicken (8, hyphened)
23 Proposition in article again having leader demoted (7)
27 Left exercises – one not showing signs of tuition (7, hyphened)
29 Yet Helen dancing is a gas...