Gradient Brian negotiated having to grit his teeth (4,3,4,2)
I believe the answer is:
grin and bear it
'to grit his teeth' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'gradient brian negotiated' is the wordplay.
'negotiated' indicates an anagram (negotiate can mean to organise or arrange).
'gradient'+'brian'='gradientbrian'
'gradientbrian' is an anagram of 'GRIN AND BEAR IT'.
'having' acts as a link.
Can you help me to learn more?
(Other definitions for grin and bear it that I've seen before include "Put up with something" , "Suffer stoically" , "like the Cheshire Cat carrying a message?" , "Endure misfortune stoically" , "take it on the chin" .)