About ten Tolstoy's heroine is on the radio (7)
I believe the answer is:
antenna
'radio' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'about ten tolstoy's heroine is on' is the wordplay.
'about' indicates anagramming the letters.
'tolstoy's heroine' becomes 'anna' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'is on' means one lot of letters goes inside another (as in clothing 'on' a person).
'ten' with letters rearranged gives 'nte'.
'nte' going within 'anna' is 'ANTENNA'.
'the' is the link.
Can you help me to learn more?
(Other definitions for antenna that I've seen before include "Insect's sensory appendage" , "could send out a message" , "connected to 41?" , "Feature of dish" , "Insect's feeler" .)