Wandering in, Queen and soldier after it (9)
I believe the answer is:
itinerant
'wandering' is the definition.
(I've seen this in another clue)
'in queen and soldier after it' is the wordplay.
'queen' becomes 'ER' (short for Elizabeth Regina ie Queen Elizabeth).
'and' is a charade indicator (letters next to each other).
'soldier' becomes 'ant' (soldier is a type of ant).
'after' means one lot of letters go next to another.
'in'+'er'='iner'
'iner' put next to 'ant' is 'inerant'.
'inerant' put after 'it' is 'ITINERANT'.
(Other definitions for itinerant that I've seen before include "Nomadic" , "Tramp" , "Rambling" , "(Person) on the move" , "Old labourer/traveller who travelled from place to place" .)