The most common and most likely answer to this crossword clue is the 3 plus 5 letter word EYE RHYME
I've seen this crossword clue in Financial Times
E
Y
E
R
H
Y
M
E
Buddy explains!
The straight part
We know that "Aspect of language that might deceive/Sean Bean, perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case aspect of language that might deceive/sean bean, perhaps = eye rhyme.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.