1) In an insinuating manner 
• (adv.) By insinuation.
In·sin'u·a`ting·ly adverb By insinuation. 
[adv] - in an insinuating manner
insinuatingly Relating to the tendency to gradually cause doubt, distrust, or change of outlook often in a slyly subtle manner.
adverb in an insinuating manner; `the art book has art to sell, insinuatingly, and for a purpose, like the American muse, which has in fact a tradition to sell, and one which doesn`t exist, in painting`