| Light source |
SOL |
| Main male |
ALPHA |
| Marathoner's challenge |
STEEPHILL |
| Move it |
THELEADOUT |
| Nabokov novel |
PNIN |
| Not call it quits |
PRESSON |
| Not e'en once |
NEER |
| Noted guerrilla |
CHE |
| Novelist Morrison |
TONI |
| Of an atrioventricular valve |
MITRAL |
| Originally, once |
ERST |
| Parrot |
ECHO |
| Pay back |
REVENGEON |
| Percolate slowly |
OOZE |
| Phil who sang 'I Ain't Marching Anymore' |
OCHS |
| Pointer mover |
MOUSE |
| Provoke |
ARISEOUTOF |
| Rowers' muscles, for short |
LATS |
| Run amok |
RIOT |
| Scram ... or a hint to solving 17-, 20-, 50- and 57-Across and 11- and 28-Down |
GETLOST |
| See 29-Down |
TOOTH |
| Sensitive things |
SORES |
| Shifts |
DRESSES |
| Short concluding stanza |
ENVOI |
| Shot orderers |
DOCS |
| Spot to order a spot |
TEASHOP |
| Star |
TOPBILLING |
| Substitute (for) |
SITIN |
| Symbol of Apollo |
LYRE |
| Things between cuts |
SCENES |
| Truant, in a way |
AWOL |
| Umbrian town |
ASSISI |
| Unalaska inhabitant |
ALEUT |
| Viewer |
EYER |
| Waters of jazz |
ETHEL |
| Welcoming |
WARM |
| Words of promise |
IDO |