Objection about sailors? It’s consigned to the flames (5)
I believe the answer is:
burnt
'consigned to the flames' is the definition.
I can't tell whether this defines the answer.
'objection about sailors?' is the wordplay.
'objection' becomes 'but' (as in 'no ifs, no buts').
'about' is an insertion indicator.
'sailors?' becomes 'RN' (abbreviation for Royal Navy).
'but' enclosing 'rn' is 'BURNT'.
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for burnt that I've seen before include "affected by singers?" , "Consumed by fire" , "Destroyed by fire" , "Incinerated" , "Damaged by fire" .)