Nice layouts arranged with great determination (11)

I believe the answer is:

tenaciously

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'nice layouts arranged with great determination' is the definition.
I can't tell whether this definition defines the answer.

'nice layouts arranged' is the wordplay.
'arranged' is an anagram indicator.
'nice'+'layouts'='nicelayouts'
'nicelayouts' anagrammed gives 'TENACIOUSLY'.

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(Other definitions for tenaciously that I've seen before include "How one would act in a stubborn way" , "in a resolute manner" .)

I've seen this clue in The Times.

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