When young, entered the outskirts of Torquay (6)
I believe the answer is:
twenty
'when young entered the outskirts of torquay' is the definition.
I can't tell whether this definition defines the answer.
'young entered the outskirts of torquay' is the wordplay.
'young' becomes 'went' (I am not sure about this - if you are sure you should believe this answer much more).
'entered' means one lot of letters goes inside another.
'the outskirts of' says to hollow out the word (remove centre letters).
'torquay' with its middle removed is 'ty'.
'went' placed within 'ty' is 'TWENTY'.
Can you help me to learn more?
(Other definitions for twenty that I've seen before include "This twice denotes normal vision" , "No longer a teenager" , "previous clue?" , "Dozen plus eight" , "One score" .)