Is value added to it? (3)
I believe the answer is:
tax
'is value' is the definition.
I can't tell whether this definition defines the answer.
'added to it?' is the wordplay.
'added' becomes 'ax' (I can't justify this - if you can you should believe this answer much more).
'to' means one lot of letters go next to another (I've seen this in other clues).
'ax' put after 't' is 'TAX'.
Can you help me to learn more?
(Other definitions for tax that I've seen before include "Demand" , "State levy" , "Impose levy or burden on" , "Levy; make demands on" , "Strain; levy" .)