Remove, as unwanted, what we don't believe in mentioning (4,3)
I believe the answer is:
weed out
'remove' is the definition.
(I know that weed out is a type of remove)
'unwanted what we don't believe in mentioning' is the wordplay.
I cannot quite understand how this works, but
'unwanted' could be 'out' (as opposed to 'in' and fashionable) and 'out' is located in the answer.
'we' is within the answer.
The remaining letters 'ed' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'as' acts as a link.
Can you help me to learn more?
(Other definitions for weed out that I've seen before include "Remove unwanted elements" , "Eliminate" , "Identify and get rid of" .)