Respect elders, so that elders eat meals first (6)
I believe the answer is:
esteem
'respect' is the definition.
(synonyms)
'elders so that elders eat meals first' is the wordplay.
'first' indicates taking the first letters.
The initial letters of 'elders so that elders eat meals' is 'ESTEEM'.
(Other definitions for esteem that I've seen before include "Respect, admire" , "judge" , "Consider" , "Good opinion" , "Respect and admiration" .)