Twbydy-am-by-3 -

But in cryptic crosswords: "piece" often means a part or a chess piece. "by 3" = tri- prefix. Could "twbydy" be "two b y d y" → musical notes? B, D?

Alternatively: the answer might be (Roman 3) as the "piece". twbydy-am-by-3

Given the cryptic style, I suspect ; "am" = morning = "AM"; "by" = next to; "3" = three letters; total maybe "FOUR AM" → anagram? But in cryptic crosswords: "piece" often means a

Given typical puzzle answer lengths, is a clue for "AM" with something? No. "am" = morning = "AM"

But: if this is a from a larger set, and the answer length is given as 3 letters, then "by 3" means the word is 3 letters long, and the preceding text gives the wordplay.