プログレッシブ和英中辞典(第4版)の解説
なれあい【×馴れ合い】
〔妥協，協定〕collusion ((between))；〔共謀〕conspiracy ((with))
なれ合いの試合
a fixed [put-up] match [game]
市長と馴れ合いで
in collusion [conspiracy] with the mayor
なれ合いの協定
a collusive agreement
二人でなれ合いでやったことだ
There was some collusion between the two.
市長と警察署長はなれ合いになっていると非難された
The mayor and the police chief were accused of 「being hand in glove [《口》 having a cozy relationship].