Hurt husband is missing a limb (3)
I believe the answer is:
arm
'limb' is the definition.
(arm is a kind of limb)
'hurt husband is missing a' is the wordplay.
'hurt' becomes 'ar' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'husband' becomes 'man' (a married man).
'is missing' indicates named letters should be taken away.
'a' becomes 'an'.
'man' with 'an' taken away is 'm'.
'ar'+'m'='ARM'
Can you help me to learn more?
(Other definitions for arm that I've seen before include "Sleeve" , "Test of strength with elbows on the table" , "Human limb" , "What soldiers do" , "strip of land?" .)