Social difficulty with mum and boy meeting decent chaps taking time (13)
I believe the answer is:
maladjustment
'social difficulty' is the definition.
'meeting decent chaps taking time' is the wordplay.
'meeting' becomes 'malad' (I am not sure about this - if you are sure you should believe this answer much more).
'decent' becomes 'just'.
'chaps' becomes 'men' (I've seen this before).
'taking' is a charade indicator (letters next to each other).
'time' becomes 't'.
'malad'+'just'+'men'+'t'='MALADJUSTMENT'
'with mum and boy' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for maladjustment that I've seen before include "Psychological inability to fit in" , "Disturbance, alienation" , "Alienation from one's environment" , "Inability to cope with a normal environment" .)