Issue of one's own, when phoney Dr Chandler Bing releases book (13)
I believe the answer is:
grandchildren
'issue' is the definition.
(I know that grandchildren is a type of issue)
'phoney dr chandler bing releases book' is the wordplay.
'phoney' indicates anagramming the letters.
'releases' indicates named letters should be taken away.
'book' becomes 'b' (abbreviation for book).
'dr'+'chandler'+'bing'='drchandlerbing'
'drchandlerbing' with 'b' taken out is 'drchandlering'.
'drchandlering' with letters rearranged gives 'GRANDCHILDREN'.
'of one's own when' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for grandchildren that I've seen before include "relatives" , "Offspring of one's offspring" , "Junior members of family" .)