| ABIGAILSPARTY | Mike Leigh play that opened at the Hampstead Theatre in April 1977 |
| ABIGAILS | Mike Leigh play that opened at the Hampstead Theatre in April 1977 |
| TOUCHED | Stephen Lowe play that opened at the Nottingham Playhouse in 1977, directed by Richard Eyre |
| THEARCADIANS | Edwardian musical comedy that opened at the Shaftesbury Theatre in London, on April 29, 1909, and ran for 809 performances |
| SERRIFFE | Guardian spoof island reported on 1 April 1977 (3,8) |
| SAN | Guardian spoof island reported on 1 April 1977 (3,8) |
| ABIGAIL | The unseen eponymous character in a Mike Leigh play |
| THEPLAYBOYOFTHEWESTERNWORLD | Three-act play by John Millington Synge that provoked riots when it opened at the Abbey Theatre, Dublin, in January 1907 |
| ANNIE | It opened at the Alvin Theatre on April 21, 1977 |
| EDENPROJECT | This visitor attraction in Cornwall opened at the beginning of June last year -- a leading track eventer was at the opening ceremony, which was very well organised (4,7) |
| ARAT | "Smelling ___" (Mike Leigh play) |
| IDEAL | Batsman opened at the right end we hear? No (5) |
| HAYWARD | Gallery opened at the South Bank, London on July 9, 1968 (7) |
| ENV | Item opened at the Oscars (abbr.) |
| GASCAP | It's opened at the pump |
| EASYVIRTUE | Noel Coward play that opened on Broadway, New York, in 1925 (4,6) |
| REACTOR | The UK's first was opened at Calder Hall in Cumbria in 1956 (7) |
| NIGHTINGALEHOSPITAL | The first of seven temporary facilities with this name was opened at London's ExCel Centre on April 3 |
| EVER | Bar that hasn't opened at any time (4) |
| NSFW | Like a file that should be opened at home, briefly |
