How do I solve 22 across in Daily Telegraph Cryptic 31256?

Question

Accepted Answer

22 across reads "Dispatch returned from Tuareg as semaphore" (7 letters); the answer is MESSAGE. 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.

Dispatch returned from Tuareg as semaphore (7)

22A — Dispatch returned from Tuareg as semaphore (7) — MESSAGE