Polish making the Brentford team get stronger! (7)
I believe the answer is:
beeswax
'polish' is the definition.
(I've seen this before)
'the brentford team get stronger' is the wordplay.
I cannot really understand how this works, but
'get' could be 'be' ('get' can mean 'come to be') and 'be' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'making' acts as a link.
Can you help me to learn more?
(Other definitions for beeswax that I've seen before include "Natural product used in polishes" , "Material in honeycombs" , "Honeycomb material" , "Output of buzzers" , "Furniture polish" .)