Measure in sections bending rule time and time again (11)
I believe the answer is:
triangulate
'measure in sections' is the definition.
(measure in triangular sections)
'bending rule time and time again' is the wordplay.
'bending' indicates anagramming the letters.
'time' becomes 't' (abbreviation).
'and' says to put letters next to each other.
'time' becomes 't' (abbreviation).
'rule'+'t'+'t'+'again'='rulettagain'
'rulettagain' with letters rearranged gives 'TRIANGULATE'.
(Other definitions for triangulate that I've seen before include "Measure in sections" , "Use a method of surveying (an area)" , "to survey position" .)