Blogger exercised about date and name of variations (8)
I believe the answer is:
goldberg
'name of variations' is the definition.
(as in Bach's Goldberg Variations)
'blogger exercised about date' is the wordplay.
'exercised' indicates an anagram.
'about' means one lot of letters goes inside another.
'date' becomes 'd' (abbreviation e.g. dob - date of birth).
'blogger' with letters rearranged gives 'golberg'.
'golberg' going around 'd' is 'GOLDBERG'.
'and' is the link.
(Other definitions for goldberg that I've seen before include "harpsichord variations" , "Bach wrote the - Variations" .)