Remove traces of oil -- a better fluid (10)

I believe the answer is:

obliterate

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'remove traces' is the definition.
'obliterate' can be an answer for 'remove' (thesaurus). I'm not certain of the 'traces' bit.

'oil a better fluid' is the wordplay.
'fluid' is an anagram indicator.
'oil'+'a'+'better'='oilabetter'
'oilabetter' anagrammed gives 'OBLITERATE'.

'of' acts as a link.

Can you help me to learn more?

(Other definitions for obliterate that I've seen before include "Wipe out" , "get rid of" , "Eradicate" , "Eliminate" , "Root out" .)

I've seen this clue in The Telegraph.

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