Rolling integrated circuit in right hand (4)
I believe the answer is:
rich
'rolling' is the definition.
(thesaurus)
'integrated circuit in right hand' is the wordplay.
'integrated circuit' becomes 'ic' (abbreviation in electronics).
'in' means one lot of letters goes inside another.
'right hand' becomes 'RH' (medical abbreviation).
'ic' placed inside 'rh' is 'RICH'.
(Other definitions for rich that I've seen before include "having much wealth" , "Containing a lot of fat, eggs and sugar" , "(Person) with plenty of money" , "Prosperous" , "Lord Chancellor" .)