Definition: "invitees"

This is a container clue - one word or letter goes inside another word. Look for an indicator that suggests one thing going around or about another.

'About' is the container indicator. Take a word meaning 'speculate' and put the letter T (time) inside it to get your answer.

Answer: GUESTS | GUESS (speculate) contains T (time) - the indicator 'about' shows T goes inside GUESS to make GUESTS (invitees)