Concentrates company returns in electrical safety equipment (7)
I believe the answer is:
focuses
'concentrates' is the definition.
('focus' can be a synonym of 'concentrate')
'company returns in electrical safety equipment' is the wordplay.
'company' becomes 'co' (abbreviation).
'returns' says the letters should be written in reverse.
'in' is an insertion indicator.
'electrical safety equipment' becomes 'fuses' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'co' backwards is 'oc'.
'oc' inserted within 'fuses' is 'FOCUSES'.
Can you help me to learn more?
(Another definition for focuses that I've seen is " Concentrates".)