In communications, the 'F' word (7)
I believe the answer is:
foxtrot
'in' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for foxtrot that I've seen before include "Lively ballroom dance" , "Ballroom dance in quadruple time" .)