More painful (6)
'more painful' is the definition.
('achy' can be similar in meaning to 'painful')
This is the entire clue.
(Another definition for achier that I've seen is " Feeling more pain".)
'more painful' is the definition.
('sore' can be similar in meaning to 'painful')
This is all the clue.
(Other definitions for sorer that I've seen before include "More painful or vexed" , "more upset" , "more resentful" , "Comparatively vexed" .)