bargaining chip 
(British also bargaining counter)
noun
A potential concession or other factor which can be used to advantage in negotiations.The territory could be used as bargaining chips in any negotiations....
- However, rather than engage in hasty strike action SIPTU is expected to use the threat of disruption as a bargaining chip in forthcoming restructuring negotiations.
- But a decision to sell off its shopping centre interest would be a major surprise as it gives the council a huge bargaining chip in negotiations over town-centre regeneration.
- tintype
- tinware
- tin whistle
- tiny
- -tion
- tip
- tip-and-run
- tipcat
- tipi
- tipicity
- tip-in
- tip-off
- tip one's hand
- tip one's hat (or cap)
- tip (or drop or turn) the bucket on
- tip (or turn) the scales
- tip (or turn) the scales at
- tip (or turn) the scales (or balance)
- Tippecanoe River
- tipper
- Tipperary
- tipper truck
- tippet
- Tippett, Sir Michael
- Tippex