Female keeping back beat to contribute (6)
I believe the answer is:
donate
'contribute' is the definition.
(I've seen this before)
'female keeping back beat' is the wordplay.
'female' becomes 'doe' (I've seen this before).
'keeping' is an insertion indicator.
'back beat' becomes 'nat' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'doe' enclosing 'nat' is 'DONATE'.
'to' is the link.
Can you help me to learn more?
(Other definitions for donate that I've seen before include "Contribute charitably" , "Give charitably - say blood" , "Give money to charity" , "Give as a gift as to charity" , "Give (money) to a good cause" .)