The phrase "a leading element of" is correct and usable in written English.
It can be used to describe a significant or influential component of a larger concept, organization, or system.
Example: "Innovation is a leading element of our company's strategy for growth."
Alternatives: "a key component of" or "a primary factor in".
On 2 May, the regiment's A Company was the leading element of the 2nd New Zealand Division and entered Trieste.
Neither estimate includes the cost of privatizing part of the Social Security program, the leading element of Mr. Bush's domestic agenda.
There, they came into contact with the NK 48th Regiment, 15th Division, the leading element of the North Korean troops.
The leading element of Sullivan's column, General Thomas Conway's brigade, attacked the British 2d Light Infantry battalion, which had been reinforced by the British 40th Regiment of Foot under command of Lieutenant-Colonel Thomas Musgrave.
Protestantism gave way to imperialism as the leading element of British national identity during the Victorian and Edwardian eras, and as such, a series of royal, imperial and national celebrations were introduced to the British people to assert imperial British culture and give themselves a sense of uniqueness, superiority and national consciousness.
In the early morning of 10 April, leading elements of the Austrian army crossed the Inn River and invaded Bavaria.
On Fox Green, at the eastern end of Omaha, four sections of L/16 had survived their landing intact and were now leading elements of I/16, K/16 and E/116 up the slopes.
Menas, diverting from conventional Byzantine tactics, decided to face Khalid and destroy the leading elements of the Muslim army before the main body could join them at Hazir, 5 km east of Chalcis.
We find it notable that, as with the quantitative findings, formal therapy was a factor but not a leading identified element of cessation; more salient seem to be enhanced self-awareness and emotion regulation skill acquisition coupled with changes in contextual factors.
Meanwhile, Trump's impatience, ignorance, insularity, Iran-fixation -- leading elements, in other words, of his syndrome -- have produced an early disaster, a disaster which Trump shows signs of wanting to further develop by expanding US intervention as part of "pushing back" against Iran.
