The phrase "a challenging gesture" is correct and usable in written English.
It can be used to describe an action or sign that is difficult to perform or interpret, often implying a level of complexity or effort involved.
Example: "The artist's latest work features a challenging gesture that invites viewers to reflect on their own experiences."
Alternatives: "a difficult gesture" or "a demanding gesture".
At Bugs, a scrap of a restaurant that opened in the East Village last summer, the mashed potatoes (perhaps better described as potato salad, pulverized) are not a challenge but a gesture of friendship from the chef, Sho Boo, and an invitation to enter her very particular world.
And in that sense, this stadium feels like a mythic gesture: A challenge for people in Qatar to see yet suppress acknowledgement of the overarching power of women on this planet.
He is also very expressive when he speaks, which can present a challenge: He makes grand gestures so often that they begin to lose any meaning or significance.
Implicit within this gesture was a challenge to the established art institutions such as museums, exhibiting groups, and galleries that have the power to determine what is and is not considered art.
The passionate vigour with which Asturias evokes the terror and distrust which poisoned the social atmosphere of the time makes his work a challenge and an invaluable aesthetic gesture.
However, the issue of high level, semantic interpretation of gestures still remains a challenge, which requires the elaboration and development of effective gesture descriptors and recognition algorithms.
It is regarded as a gesture of challenge or defiance.
These days he is challenging teammates who make mistakes and gesturing with exasperated waves of his hands on the sideline.
"These people were overworked and challenged, and it was a gesture, a way of saying thanks".
The traditional view of a predominant inferior parietal representation of gestures has been recently challenged by neuroimaging studies demonstrating that gesture production and discrimination may critically depend on inferior frontal lobe function.
