Streep finally gets to play Bond! (4)
I believe the answer is:
pact
'bond' is the definition.
(thesaurus)
'streep finally gets to play' is the wordplay.
'finally' says to take the final letters.
'gets' is a charade indicator (letters next to each other).
'to play' becomes 'act' ('act' can be a synonym of 'play'**).
The final letter of 'streep' is 'p'.
'p'+'act'='PACT'
(Other definitions for pact that I've seen before include "Agreement, covenant" , "Alliance" , "International treaty" , "Agreement, bargain" , "Written agreement between two states" .)