I'm shocked at the 'suggestion' that he deliberately cheated. = The very 'suggestion' that he deliberately cheated is shocking (to me).
They were careful to avoid any 'suggestion' of impropriety. [=avoid doing anything that could be seen as improper]
There was some 'suggestion' of swelling around his ankle. [=his ankle appeared to be slightly swollen]
(..) cannot be good. If ill, why hath it given me earnest of success, commencing in a truth? I am Thane of Cawdor. If good, why do I yield to that suggestion whose horrid image doth unfix my hair and make my seated heart knock at my ribs against the use of nature? Present fears are less (..)2015 Macbeth