Breaches of First Amendment (5)
I believe the answer is:
rifts
'breaches' is the definition.
(I know this)
'first amendment' is the wordplay.
'amendment' indicates an anagram.
'first' with letters rearranged gives 'RIFTS'.
'of' is the link.
(Other definitions for rifts that I've seen before include "Splits" , "Clefts in earth, or disagreements" , "Schisms" , "Clefts or fissures." , "Breaks, severances" .)