手懸かり

(1)something crucial for explaining; "the key to development is economic integration"

(2)説明するために重要な何か

(3)a slight indication

(4)わずかな暗示

(5)evidence pointing to a possible solution; "the police are following a promising lead"; "the trail led straight to the perpetrator"

(6)可能な解決策を示す証拠

(7)evidence that helps to solve a problem

(8)問題を解く助けになる証拠