The most common and most likely answer to this crossword clue is the 4 plus 7 plus 4 letter word WEAR SEVERAL HATS
W
E
A
R
S
E
V
E
R
A
L
H
A
T
S
More clues leading to the result WEAR SEVERAL HATS
Buddy explains!
The straight part
We know that "do multiple roles" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case do multiple roles = wear several hats.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.