key player

It is often a key player in areas where business and national security interests collide, such as restricting technology exports to China or enacting tariffs to protect US steel.

Reports in Brazilian media suggest he was once considered a key player in the gang's operation.

He made the exact journey that Suaalii has mapped out - from a top-level rugby union debut to key player in the 2001 Lions Test series in little over half a year - before going on to win the Rugby World Cup with England in 2003.

Since he became a key player in Real's team, La Liga has referred 21 racist incidents involving the superstar to local prosecutors, as a result of regular abuse from the stands, monkey chants and an effigy hung from a bridge being directed his way.

TAI is a key player in Turkey’s aerospace industry, designing, developing and manufacturing various aircraft for commercial and military use.