The most common and most likely answer to this crossword clue is the 13 letter word TUMBLE-DRIERS
T
U
M
B
L
E
-
D
R
I
E
R
S
Buddy explains!
The straight part
We know that "utilities" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case utilities = tumble-driers.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.