Related Clues:
- Enigmatic, keen and in charge, set about exercising
- The other kind of crossword
- Secret - mysterious
- Very mysterious
- The other crossword
- Mysterious - an acre (anag)
- Mysteriously obscure
- Like election laws, typically
- Mysterious, understood by few
- Type of crossword clue (but not this one!)
- Not widely understood
- Something quite clear can easily become mysterious
- Type of crossword
- Understood only by a few
- Mysterious or understood by few