How do I solve 3 down in Times Cryptic 5218?

Question

Accepted Answer

3 down reads "Snacks, milk and a slice of salami" (5 letters); the answer is TAPAS. It's a letter-selection clue: take specific letters from a longer source. 'First of' means the opening letter, 'extremely' means first + last, 'regularly' means every other letter, 'oddly' / 'evenly' means odd or even positions. The full step-by-step breakdown is on this page.

Snacks, milk and a slice of salami (5)

3D — Snacks, milk and a slice of salami (5) — TAPAS