Nevada man Tom keeps resolute (7)

I believe the answer is:

adamant

'resolute' is the definition.
(both can mean determined)

'nevada man tom keeps' is the wordplay.
'keeps' says the answer is hidden in the clue.
'ADAMANT' is hidden within 'nevada man tom'.

(Other definitions for adamant that I've seen before include "Inflexible: fabulously hard rock" , "Resolute; diamond (arch.)" , "Unyielding to requests, stubborn" , "Completely determined" , "Positive or intransigent" .)

I've seen this clue in The Sun.

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