a person who wishes, or who is put forward by others, to take an office or position (e.g. for election to Parliament)

person desiring political office, job

a question, person, thing, circumstance, that is puzzling

mystery

something of which the cause or origin is impossible to explain or understand

puzzle, secret

a question, statement or description, intended to make a person think hard in order to know the answer or meaning; to make many holes in a person, thing

brain-teaser