Competitions between banks? (8)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">competitions between banks?</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for regattas that I've seen before include "causing lots of rows" , "race-meetings" , "Series of boat races" , "Boating events" , "Meetings for boat races" .)