Dismissal from Wellington's command? (5,2,3,4)

'dismissal' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'wellington's command?' is the wordplay.
I cannot really see how this works, but
'command?' could be 'order' (order is a kind of command) and 'order' is located in the answer.
'wellington' could be 'boot' (Wellington boots are a type of shoe) and 'boot' is found within the answer.
The remaining letters 'ofthe' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

'from' acts as a link.