プログレッシブ和英中辞典(第4版)の解説
それとない【×其れとない】
❶〔何気無い〕
彼女の喜びはそれとない手の動きに表れていた
「Her joy was evident [You could see her joy] in even the slightest movement of her hands.
❷〔遠回しの〕
彼の手紙にはそれとない依頼がしたためてあった
There was 「an indirect [a vaguely expressed] request in his letter./You could read a request between the lines of his letter.