Attorney volunteers, ready to get some information (4,3)
I believe the answer is:
data set
'some information' is the definition.
(I've seen this before)
'attorney volunteers ready to' is the wordplay.
'attorney' becomes 'D.A.' (abbreviation for District Attorney).
'volunteers' becomes 'TA' (abbreviation for Territorial Army).
'ready to' becomes 'set' (synonyms).
'da'+'ta'+'set'='DATA SET'
'get' acts as a link.
(Other definitions for data set that I've seen before include "file" , "Collection of information (in computing)" , "collected info" .)