The term 'Just a Minute' is an idiom used to ask someone to WAIT or pause for a short time. The crossword solutions for this term are HEY (3 letters), WAIT (4 letters), and ONESEC (6 letters). HEY is an informal way of getting someone's attention, WAIT is an imperative verb meaning to remain in the same place until further notice, and ONESEC is an abbreviation of the phrase 'one second', which is another way of asking someone to WAIT for a brief period of time.