The most common and most likely answer to this crossword clue is the 8 letter word BELFRIES
I've seen this crossword clue in The Daily Telegraph
B
E
L
F
R
I
E
S
More clues leading to the result BELFRIES
Buddy explains!
The straight part
We know that "rooms at the top" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rooms at the top = belfries.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.
What does BELFRIES mean?
BELFRIES noun- A movable tower used in sieges.
- A shed.
- An alarm-tower; a watchtower containing an alarm-bell.
- A tower or steeple specifically for containing bells, especially as part of a church.
- A part of a large tower or steeple, specifically for containing bells.