Friends given the most common component of breeze block (6)
I believe the answer is:
oppose
'block' is the definition.
(I've seen this in another clue)
'friends given the most common component of breeze' is the wordplay.
'friends' becomes 'oppos' (oppo can informally mean a friend).
'given' means one lot of letters go next to another.
'the most common component of breeze' becomes 'e' (I can't explain this - if you can you should believe this answer much more).
'oppos'+'e'='OPPOSE'
Can you help me to learn more?
(Other definitions for oppose that I've seen before include "Resist, contend with" , "Act against" , "match" , "'Refute, stand against (6)'" , "Take stand against, resist" .)