Continuous pain in stomach eased (4)
I believe the answer is:
ache
'continuous pain' is the definition.
(I've seen this in another clue)
'in stomach eased' is the wordplay.
'in' indicates a hidden word.
'ACHE' is hidden in the letters of 'stomach eased'.
(Other definitions for ache that I've seen before include "Feel sore" , "yearning" , "Take an aspirin for it" , "Dull throbbing pain" , "Throb - hurt" .)