Collect gun that belongs to that woman (6)
I believe the answer is:
gather
'collect' is the definition.
(I know that collect can be written as gather)
'gun that belongs to that woman' is the wordplay.
I cannot really see how this works, but
'gun' could be 'gat' (US informal term for a gun) and 'gat' is found within the answer.
'woman' could be 'her' (her refers to a woman) and 'her' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for gather that I've seen before include "Harvest or learn by inference" , "Come/bring together" , "Congregate" , "Collect or asemble" , "From information given, learn" .)