Try me out with my singular correspondence! (8)
I believe the answer is:
symmetry
'correspondence' is the definition.
(synonyms)
'try me out with my singular' is the wordplay.
'out with' is an anagram indicator (out can mean wrong or inaccurate).
'singular' becomes 's' (abbreviation sometimes used in dictionaries).
'try'+'me'='tryme'
'my'+'s'='mys'
'tryme' anagrammed with 'mys' can make 'SYMMETRY'.
(Other definitions for symmetry that I've seen before include "Exact correspondence between parts" , "Pleasing proportion of the parts of a thing" , "Balance between two parts" , "Pleasing proportion between parts of a whole" , "Due proportion" .)