The most common and most likely answer to this crossword clue is the 9 letter word CAMPANILE
I've seen this crossword clue in The Guardian
C
A
M
P
A
N
I
L
E
More clues leading to the result CAMPANILE
- Bell tower in quiet area between two rivers
- Tower that’s ostentatious on a river
- Tower in main place rebuilt
- Party on a river tower
- Affected adult line’s mobile ringtone sender?
- Tower in settlement above a river
- Feature of Venice affected, with a large flow of water underneath
- Expect high tolls here
- Tower in settlement north of a river
- Bell tower affected imbecile
Buddy explains!

The straight part
We know that "Tower/Tower" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tower/tower = campanile.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 CAMPANILE mean?
CAMPANILE noun- A bell tower (now especially when freestanding), often associated with a church or other public building, especially in Italy.