Volunteers set out to get sample (5)
I believe the answer is:
taste
'sample' is the definition.
('taste' can be a synonym of 'sample')
'volunteers set out' is the wordplay.
'volunteers' becomes 'ta' (abbreviation for Territorial Army).
'out' indicates an anagram (out can mean wrong or inaccurate).
'set' anagrammed gives 'ste'.
'ta'+'ste'='TASTE'
'to get' acts as a link.
(Other definitions for taste that I've seen before include "To eat sparingly" , "Impression from food" , "Perceive the flavour" , "Appreciation, discernment" , "Sample, savour" .)