Related Clues:

• Bats getting a century, a half-century and two ducks possibly
• Engine getting round the bend
• Started to write in dictionary, initially
• Batty, in Mexico
• Unfastened or moved a barrier
• Engine off the rails
• Engine not all there?
• Not mentally sound, in Seville
• Revealed no deep impression
• Batty, in Spain
• Had the first act
• Engine — nuts
• Spanish nuts
• Mad kind of motive?
• Exposed writer in school, caught out