Feel pain (4)
'feel pain' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for ache that I've seen before include "Each (anag.)" , "Feel pain" , "yearning" , "Long ? pain" , "Similar" .)
'feel pain' is the definition.
(ailing is a kind of feeling pain)
This is the entire clue.
(Other definitions for ail that I've seen before include "Cause to feel indisposed" , "upset" , "Sink" , "Be unwell, suffer" , "Sicken" .)