DNA compound whose name includes the letters D, N and A

ADENINE

This nitrogenous base pairs with thymine in DNA and is also a key component of ATP, the cell's energy currency.

The clue hints at a compound found in DNA by directly referencing its name—specifically, the letters "D," "N," and "A." Since "adenine" is one of the four nucleobases in DNA and its name contains all three of those letters, it fits perfectly. The wordplay is straightforward: the clue highlights the letters as a way to point you toward the answer without spelling it out.