Come to a terribly weak point (6)
I believe the answer is:
awaken
'come to' is the definition.
(I've seen this before)
'a terribly weak point' is the wordplay.
'terribly' indicates anagramming the letters.
'point' becomes 'n' (N is an example).
'weak' anagrammed gives 'wake'.
'a'+'wake'+'n'='AWAKEN'
(Other definitions for awaken that I've seen before include "Rouse (a feeling)" , "Arouse" , "Emerge from sleep" , "Rouse from sleep" , "Come alive" .)