Oscar having way with incredibly dry wit that may offend (5,4)
I believe the answer is:
dirty word
'may offend' is the definition.
I know nothing about this answer so I can't judge whether this works.
'oscar having way with incredibly dry wit' is the wordplay.
'oscar' becomes 'O' (phonetic alphabet: alpha, bravo, charlie etc.).
'having' means one lot of letters go next to another.
'way' becomes 'rd' (short for road).
'with' says to put letters next to each other.
'incredibly' is an anagram indicator.
'dry'+'wit'='drywit'
'drywit' anagrammed gives 'dirtyw'.
'o'+'rd' is 'ord'.
'ord' after 'dirtyw' is 'DIRTY WORD'.
'that' is the link.
Can you help me to learn more?
(Other definitions for dirty word that I've seen before include "(Expletive deleted!)" , "What profit is to a communist" , "said to be shocking?" .)