Most likely made Bob paler (8)
I believe the answer is:
probable
'most likely' is the definition.
(I've seen this before)
'made bob paler' is the wordplay.
'made' indicates an anagram.
'bob'+'paler'='bobpaler'
'bobpaler' is an anagram of 'PROBABLE'.
(Other definitions for probable that I've seen before include "Person most likely" , "Likely to be the case" , "on the cards" , "Likely to happen but not certain" , "Seeming to have a good chance of happening" .)