Service chief backs small member of big organisation (3)
I believe the answer is:
cog
This clue might be a double definition.
'service chief backs small' is the first definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'member of big organisation' is the second definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
Can you help me to learn more?
(Other definitions for cog that I've seen before include "Machine component" , "One on a gearwheel" , "Projection on a toothed wheel" , "one engaged in revolutionary activity" , "Minor player" .)