Please could I have some explanation for my answers.
6d Dog leads needed for peace of mind (3) P?M Have decided on POM as short for a breed of dog and first letters of last 3 words of clue.
25d Jack and ten, initially, then ace, king, or queen (3) Have decided on TAR as Jack Tar (sailor) and T being first letter of ten but can't acount for ace, king, or queen.
21d Significance of minutes grasped by one side of board(6) Have decided on IMPORT as only word that fits and port is one side of ship (on board). The M is part of answer to 22a which is correct.