gully cutting
n.— «This tree in Strickland Place, Wentworthville, has undergone an extreme topiary make-over to allow room for overhead powerlines.…Arborist Hugh Taylor from Australian Tree Consultants said the practice was known as “gully cutting” and was mainly done when trees grew around power lines.» —“Power cut” Daily Telegraph (Surry Hills, New South Wales, Australia) Mar. 2, 2006. (source: Double-Tongued Dictionary)