Be brave enough to read a review (4)
I believe the answer is:
dare
'be brave enough' is the definition.
(I've seen this in another clue)
'read a review' is the wordplay.
'a review' indicates anagramming the letters.
'read' is an anagram of 'DARE'.
'to' is the link.
(Other definitions for dare that I've seen before include "Risk; challenge" , "Venture, have courage" , "Challenge, defy, face" , "Challenge to do something dangerous" , "Challenge of courage" .)