13 across
Rod’s
letter
is
spoken
of
(3)
Rod’s letter is spoken of (3)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Rod — a cue is a billiards rod, simple as that. Then the wordplay has you think of "letter" as the actual letter Q, and "is spoken of" tells you it's a homophone, so Q said aloud gives you CUE.