Support for limb motionless initially in seizure (7)
I believe the answer is:
armrest
'motionless initially in seizure' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'support for limb' is the wordplay.
'support' becomes 'rest' (e.g. a shoulder rest is a support for shoulder).
'for' means one lot of letters go next to another (I've seen this in other clues).
'limb' becomes 'arm' (arm is a kind of limb).
'rest' put after 'arm' is 'ARMREST'.
Can you help me to learn more?
(Other definitions for armrest that I've seen before include "sort of support is needed" , "Part of a chair, perhaps" , "support of chairperson?" , "Part of a chair - smarter (anag)" , "Part of sofa or chair" .)