Got there perhaps but not by oneself (8)
I believe the answer is:
together
'not by oneself' is the definition.
I can't judge whether this defines the answer.
'got there perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'got'+'there'='gotthere'
'gotthere' is an anagram of 'TOGETHER'.
'but' is the link.
Can you help me to learn more?
(Other definitions for together that I've seen before include "On the trot" , "at the same time" , "as a group" , "Married" , "Not apart" .)