Is suitable only in spasms (4)
I believe the answer is:
fits
This clue might be a double definition.
'is suitable' is the first definition.
(I've seen this in another clue)
'only in spasms' is the second definition.
The answer and definition can be both states of affairs as well as being plural nouns.
Maybe they are linked in a way I don't understand?
Can you help me to learn more?
(Other definitions for fits that I've seen before include "Sudden uncontrollable attacks" , "Prepares" , "short bouts" , "Is of the right shape and size" , "feels comfortable" .)