Source : Webster's Revised Unabridged Dictionary (1913)

Inkling \In"kling\, n.
   A hint; an intimation.

         The least inkling or glimpse of this island. --Bacon.

         They had some inkling of secret messages. --Clarendon.

Source : WordNet®

inkling
     n : a slight suggestion or vague understanding; "he had no
         inkling what was about to happen" [syn: {intimation}, {glimmering},
          {glimmer}]