In chess, perhaps, manoeuvre ultimately surrendering piece? (6)

I believe the answer is:
gambit
'in chess perhaps manoeuvre' is the definition.
I can't judge whether this defines the answer.
'ultimately surrendering piece?' is the wordplay.
'ultimately' suggests the final letters.
'piece?' becomes 'ambit' (I can't explain this - if you can you should believe this answer much more).
The last letter of 'surrendering' is 'g'.
'g'+'ambit'='GAMBIT'
Can you help me to learn more?
(Other definitions for gambit that I've seen before include "Eg, minestrone" , "Initial move in chess" , "play involving sacrifice" , "first move" , "Opening manoeuvre" .)
