Walk with difficulty, having wilted? (4)
I believe the answer is:
limp
I believe this is a double definition.
'walk with difficulty' is the first definition.
(I've seen this in another clue)
'wilted?' is the second definition.
(synonyms)
'having' acts as a link.
(Other definitions for limp that I've seen before include "Flaccid" , "exhausted" , "Walk haltingly" , "Weak" , "Lacking stiffness" .)