Make style fresh in an enthusiastic manner (9)

I believe the answer is:

earnestly

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'make style fresh in an enthusiastic manner' is the definition.
I can't tell whether this definition defines the answer.

'make style fresh in' is the wordplay.
'make' becomes 'earn' (as in making money).
'fresh' indicates an anagram (a fresh re-ordering of the letters).
'in' means one lot of letters goes inside another.
'style' is an anagram of 'estly'.
'earn' put within 'estly' is 'EARNESTLY'.

Can you help me to learn more?

(Other definitions for earnestly that I've seen before include "Sincerely and seriously" , "Showing commitment" , "with heart and soul" , "Showing serious intent" , "Zealously" .)

I've seen this clue in The Telegraph.

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