Title giving lad more trouble (7)
I believe the answer is:
earldom
'title' is the definition.
(I've seen this before)
'giving lad more trouble' is the wordplay.
'giving' is a charade indicator (letters next to each other).
'trouble' is an anagram indicator.
'lad'+'more' is 'ladmore'.
'ladmore' anagrammed gives 'EARLDOM'.
(Other definitions for earldom that I've seen before include "Peer's rank" , "Norfolk or Wessex, for example" , "Domain of a mid-ranking peer" , "Title or estates of a nobleman" , "A noble's lands or title" .)