How do I solve 22 across in Daily Telegraph Cryptic 31243?

Question

Accepted Answer

22 across reads "Meat – try half of it" (5 letters); the answer is HEART. 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.

Meat – try half of it (5)

22A — Meat – try half of it (5) — HEART