Mutinous porter will carry nothing for a soldier (7)
I believe the answer is:
trooper
'for a soldier' is the definition.
(trooper is a kind of soldier)
'mutinous porter will carry nothing' is the wordplay.
I cannot quite see how this works, but
'nothing' could be 'o' (looks like zero - 0) and 'o' is found within the answer.
an anagram of 'porter' is 'troper' which is within the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for trooper that I've seen before include "He swears" , "Cavalry 21" , "Proverbially swearing soldier" , "Soldier, proverbial swearer" , "Cavalryman" .)