Crossword Genius

Determined to tear around making a constant charge (5,4)

Ross

I believe the answer is:

fixed rate

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'a constant charge' is the definition.
I know nothing about this answer so I can't tell whether this works.

'determined to tear around' is the wordplay.
'determined' becomes 'fixed' (similar in meaning).
'to' means one lot of letters go next to another.
'around' indicates anagramming the letters.
'tear' with letters rearranged gives 'rate'.
'fixed'+'rate'='FIXED-RATE'

'making' is the link.

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I've seen this clue in the Evening Standard.
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