Here are the possible solutions for first word of a three word command clue
Answer
Clue
Relevancy
ready
Clue
First word of a three-word command
Definition
prepared
fun
Clue
First word across in the first-ever crossword (1913) and the first of a dozen appearances of the word in this puzzle's grid, written word search-style (left, right, down, and diagonally) ... Can you f
Definition
to act playfully
brainteaser
Clue
"If three hens lay three eggs in three days ...," e.g.
Definition
something (as a puzzle) that demands mental effort and acuity for its solution
sos
Clue
Three short, three long, three short
namedtags
Clue
Following a command hidden in this answer, convention handouts; following the command another way, one flaunting their friends
undo
Clue
Command-Z command
Command + Z command
baby
Clue
First word of the three-word title of a 1992 Sir Mix-a-Lot single