Adolescent limped: he’s gone over on uncovered toys (11)

'adolescent' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'limped he's gone over on uncovered toys' is the wordplay.
'limped' becomes 'hobbled' ('hobble' can be a synonym of 'limp').
'gone over' shows that the letters should be reversed in order.
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'uncovered' indicates the central letters.
The central letters of 'toys' are 'oy'.
'he' backwards is 'eh'.
'hobbled'+'eh'+'oy'='HOBBLEDEHOY'

Can you help me to learn more?