Mike, flexible, fully promotes one prosthetic filler (7)
I believe the answer is:
implant
'prosthetic filler' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'mike flexible fully promotes one' is the wordplay.
I cannot really understand how this works, but
'mike' could be 'm' (phonetic alphabet: alpha, bravo, charlie etc.) and 'm' is located in the answer.
'one' could be 'an' (an apple is one apple) and 'an' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for implant that I've seen before include "Fix firmly" , "Bristol may get boost from this" , "Artificial insert in body" , "Graft into the body" , "Insert in tissue" .)