PHONETIC BEHEADMENT
The Enigma
NPL Magazine
January, 2020
HALE (adapted)

The answers to the keywords in this flat differ by their initial sounds. The initial sound of the first answer is dropped to form the second answer.

Danger! Danger! Mind the Gap!
Wait. My mistake. It's _ _ _ _ _ _ _  not _ _ _ _ _ .

HINT:
Notice that "Gap" is capitalized.*

Answer:

APPAREL - PERIL

*Gap - The Gap clothing store (not gap - as an open space)