| Answer | Crossword Clue |
|---|---|
| ACRO | High opening? |
| ACRO | High opening |
| ALTI | High opening? |
| ALTI | High opening |
| HOPES | They're high on opening day |
| preemptive | Denoting a bid, typically an opening bid, intended to be so high that it prevents or interferes with effective bidding by the opponents |
| desmodromic | denoting a system, used in some motorcycle and racing car engines, that employs eg cams, rockers, etc to ensure that the opening and closing of valves, when the vehicle is at high speed, is fully controlled |
