Preposition: of

• opposition: But what of the pretender to the throne of leader of the opposition?

• expedition: He was leader of a school expedition to Tanzania, and continues to be involved with school expeditions to the developing world.

• party: Leaders of the largest Kurdish workers party categorically denied participation of their troops.

Converse of object

• elect: In America they have struggled to elect a leader.

• become: Indiana is quickly becoming a leader in the nation's biofuels industry.

• appoint: There is also an urgent need to appoint youth leaders from diverse minority ethnic communities to support young people.

Preposition: in

• field: Head of department is Danny Simpson, recognized to be a ' leader in the field ' for his civil liberties criminal work.

• manufacture: VELUX Company Ltd is the market leader in the manufacture of roof windows.

Adjective modifier

• religious: They had been whipped into a frenzy by religious leaders.

• Conservative: Mr Smith said he planned to report Conservative leader Michael Howard to the police for " inciting racial hatred " .

• deputy: He said his deputy leader had told me that.

• Iraqi: Baghdad is festooned with large posters of the Iraqi leader in various poses handling guns, which anyone over 25 can buy.

• global: Rewards are as you would expect from a global market leader!

Noun used with modifier

• union: The union leaders must do more than " consult " their members.

• market: DMC are one of the market leaders in DJ Disks.

• worship: Featuring 50 fantastic songs from some of the best loved worship leaders, including Stuart Townend, Geraldine Latty... .

• world: Scottish Smoked Salmon is still a world leader, be it wild, organic or farmed.

• church: Your church leader has predicted the imminent end of the world.

• team: That would be something like ' employer ' or ' team leader ' , ' personal tutor ' or ' family friend ' .