| Answer | Crossword Clue |
|---|---|
| midweekly | taking place in the middle of the week |
| midweek | of, pertaining to, or occurring in the middle of the week |
| astrolabe | astronomical instrument for taking the altitude of the sun or stars and for the solution of other problems in astronomy and navigation: used by Greek astronomers from about 200 b.c. and by Arab astronomers from the Middle Ages until superseded by the sext |
| ichor | ethereal fluid taking the place of blood in the veins of the ancient Greek gods |
| PIANISSIMO | Musical direction, and a hint to the quiet meetings taking place in the answers to starred clues |
| ifs | the middle frequency in a superheterodyne receiver, at which most of the amplification takes place |
