Trace soldiers with a wife abroad (7)
I believe the answer is:
signora
'wife abroad' is the definition.
I can't judge whether this defines the answer.
'trace soldiers with a' is the wordplay.
'trace soldiers with' becomes 'signor' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'signor'+'a'='SIGNORA'
Can you help me to learn more?
(Other definitions for signora that I've seen before include "wife on the Continent" , "to Italy, madam" , "Italian equivalent of madam" , "Italian married title" , "Italian madam or Mrs" .)