'最终有个交代‘, '交代’ meaning The sentence comes to my mind is 


  at least, in the end, I can say that I tried everything I could.


Is there a corresponding expression for ‘交代’ here?
「交代 」


(v)  to answer to  / to explain / to report ; 
(n)  explanation / justification


Example: 

向民眾交代 (answer to the people / explain to the people)

給民眾一個交代 (give people an explanation)

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最終有個**交代** meaning


It means " At the end, there will be an explanation"

More example: 

怎樣向皇上交代 ( how to explain / report it to the emperor?)

你可獻上我的頭顱作為交代 ( you can offer my head as your report) 

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Additional Note:

交代 mainly means "explain" or "explanation", and by extension, it also carries meanings of "report" and "instruction" 


If you explain how you've carried out a task to your boss - that would be "giving a report".
If you explain how to carry out a task to your son - that would be "giving an instruction".