Secure power at home with charge (6)
I believe the answer is:
pinion
'secure' is the definition.
(thesaurus)
'power at home with charge' is the wordplay.
'power' becomes 'p'.
'at home' becomes 'in' (similar in meaning).
'with' means one lot of letters go next to another.
'charge' becomes 'ion' (an ion is a charged particle).
'p'+'in'+'ion'='PINION'
(Other definitions for pinion that I've seen before include "Part of bird's wing" , "Wing of a bird" , "gear wheel" , "Restrain by holding, or bird's wing" , "Wing; bind; cog" .)