This little signature might be the only clue that catches a perceptive eye as the concealed butterfly cosies down to rest.

The only clue to the blast was a small twisted piece of metal.

The only clue that the house was located somewhere quite different was the enormous jacaranda tree to its left, in full pink-purple bloom.

The only clue came from the composer's work as a whole; his operas rarely end without forgiveness.

Cars these days have become an outer set of clothes, the only clue that passers-by have about what sort of person you are.