Digital nomad's first rum mixed with ice (7)
I believe the answer is:
numeric
'digital' is the definition.
(thesaurus)
'nomad's first rum mixed with ice' is the wordplay.
'nomad's first' becomes 'n' (1st letter of 'nomad').
'mixed with' indicates an anagram.
'rum' with its letters anagrammed with 'ice' gives 'umeric'.
'n'+'umeric'='NUMERIC'
(Other definitions for numeric that I've seen before include "Relating to numbers" , "Consisting of numbers" , "Employing figures" , "Expressed in numbers" , "Expressed in figures" .)