Some current hampered endlessly (6)

I believe the answer is:

ampere

'some current' is the definition.
(unit for electrical current)

'hampered endlessly' is the wordplay.
'endlessly' means to look at the middle letters (the ends of the words are removed).
The centre of 'hampered' is 'AMPERE'.

(Other definitions for ampere that I've seen before include "Unit of electrical current" , "Current analyst" , "Unit of currency" , "Unit measured by 17 across" , "Basic SI unit of electric current" .)

I've seen this clue in the Sydney Morning Herald.

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