Tip rotten eggs on suit (10)
I believe the answer is:
suggestion
'tip' is the definition.
(thesaurus)
'rotten eggs on suit' is the wordplay.
'rotten' indicates anagramming the letters.
'eggs'+'on'+'suit'='eggsonsuit'
'eggsonsuit' with letters rearranged gives 'SUGGESTION'.
(Other definitions for suggestion that I've seen before include "one may be going to box?" , "Hint" , "Proposition" , "suspicion" , "Idea put forward for consideration" .)