Complained loudly (6)
I believe the answer is:
railed
'complained loudly' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for railed that I've seen before include "Complained strongly, being barred" , "Complained in Lerida" , "Complained, being fenced in? (6)" , "Redial (anag.)" , "Complained bitterly - with a guard" .)