Suggestions. Once more it's damn complicated (15)
I believe the answer is:
recommendations
'suggestions' is the definition.
(I've seen this before)
'once more it's damn complicated' is the wordplay.
'complicated' indicates anagramming the letters.
'once'+'more'+'its'+'damn'='oncemoreitsdamn'
'oncemoreitsdamn' with letters rearranged gives 'RECOMMENDATIONS'.
(Other definitions for recommendations that I've seen before include "suggestions" , "advice" .)