Have a sneaking suspicion is an expression used to describe a feeling of unease or doubt about something. It can be used to describe a feeling that something is wrong, or that someone is not being truthful. The two crossword solutions for this term are FEAR (4 letters) and SENSE (5 letters). FEAR is an emotion that is often associated with suspicion, as it can be a sign that something is wrong. SENSE is a word that can refer to a feeling or intuition, which can also be associated with suspicion.