Friend, without hesitation, getting Boy's Own (8)
I believe the answer is:
personal
'own' is the definition.
(similar in meaning)
'friend without hesitation getting boy's' is the wordplay.
'friend' becomes 'pal' (pal can mean a friend).
'without' indicates putting letters inside ('without' can be similar in meaning to 'outside').
'hesitation' becomes 'er' (sound made while hesitating - um, er).
'getting boy' becomes 'son' (I am not sure about this - if you are sure you should believe this answer much more).
'er'+'son'='erson'
'pal' enclosing 'erson' is 'PERSONAL'.
Can you help me to learn more?
(Other definitions for personal that I've seen before include "Individual; advert (column)" , "Pertaining to the self" , "Such a rude remark" , "Wounding" , "Of one individual" .)