Together, women finally breaking a record (5)
I believe the answer is:
along
'together' is the definition.
(I've seen this before)
'women finally breaking a record' is the wordplay.
'finally' suggests the final letters.
'breaking' is an insertion indicator.
'record' becomes 'log' (logging is a kind of recording**).
The last letter of 'women' is 'n'.
'a'+'log'='alog'
'n' put inside 'alog' is 'ALONG'.
(Other definitions for along that I've seen before include "together" , "From one end to the other" , "(Going) in company (with others)" , "Lengthwise" , "With a forward motion: in accompaniment" .)