Hold back burden (7)
I believe the answer is:
refrain
I believe this is a double definition.
'hold back' is the first definition.
(thesaurus)
'burden' is the second definition.
(thesaurus)
(Other definitions for refrain that I've seen before include "Abstain; chorus" , "Cease - repeated phrase" , "Forbear from chorus?" , "Chorus; desist" , "Recurring music to forbear from" .)