| '60s trip inducer |
LSD |
| 'Goodnight' girl of song |
IRENE |
| 'I Like ___' (1950s campaign button) |
IKE |
| 'Little' heroine of Dickens's 'The Old Curiosity Shop' |
NELL |
| 'Plan 9 From ___ Space' |
OUTER |
| 'Treasure Island' author's inits |
RLS |
| 'When you wish upon ___ ...' |
ASTAR |
| 11th grader's exam, for short |
PSAT |
| 1962 film about Helen Keller, with 'The' |
MIRACLEWORKER |
| 2016 Olympics city, informally |
RIO |
| Abominable |
AWFUL |
| Actress Holmes |
KATIE |
| Add more to, as someone's drink |
FRESHEN |
| Auto pioneer Ransom E. ___ |
OLDS |
| Baby grand, e.g |
PIANO |
| Bad-mouth |
SMEAR |
| Be dead and buried, in slang |
PUSHUPDAISIES |
| Belly button type |
INNIE |
| Betting parlor V.I.P |
ODDSMAKER |
| Big name in faucets |
MOEN |
| Bopping on the head |
CONKING |
| Classic computer game set on an island |
MYST |
| Clip-clop sound producer |
HOOF |
| Competitor of Boeing |
AIRBUS |
| Computer in '2001' |
HAL |
| Country singer Williams |
LUCINDA |
| Cuts down on calories |
DIETS |
| Daddy-o |
POPS |
| Dangers for the unwary ... or a hint to the starts of 17-, 23- and 47-Across? |
BOOBYTRAPS |
| Departed |
WENT |
| Eastwood of Hollywood |
CLINT |
| Essential |
NECESSARY |
| Facts collected by spies, informally |
INTEL |
| Finnish tech giant |
NOKIA |
| Frequently, to poets |
OFT |
| From County Clare, e.g |
IRISH |
| Furnish temporarily |
LEND |
| Gorillas |
APES |