Absolutely what V could signify (4)
I believe the answer is:
very
'absolutely' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for very that I've seen before include "light, perhaps" , "Actual; in a high degree" , "Exceedingly" , "Truly" , "Extremely - light" .)