Scrap metal's last to be removed in plane trip (5)
I believe the answer is:
fight
'scrap' is the definition.
(I know that scrap can be written as fight)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for fight that I've seen before include "Attack or engage in combat" , "(Take part in) battle" , "Spar" , "Scrap" , "Come to blows" .)