The first woman with others finding mountain (7)
I believe the answer is:
everest
'mountain' is the definition.
(Mount Everest)
'the first woman with others' is the wordplay.
'the first woman' becomes 'Eve' (first woman in the bible).
'with' means one lot of letters go next to another.
'others' becomes 'rest' (eg the rest of a group).
'eve'+'rest'='EVEREST'
'finding' is the link.
(Other definitions for everest that I've seen before include "A high spot" , "Highest Himalayan mountain" , "Great achievement" , "A mountain to climb" , "Himalayan mount" .)