Loads of hesitation with parking by young person (7)
I believe the answer is:
umpteen
'loads' is the definition.
'hesitation with parking by young person' is the wordplay.
'hesitation' becomes 'um'.
'with' is a charade indicator (letters next to each other).
'parking' becomes 'p'.
'by' says to put letters next to each other.
'young person' becomes 'teen' (I've seen this before**).
'um'+'p'+'teen'='UMPTEEN'
'of' acts as a link.
(Other definitions for umpteen that I've seen before include "Plentiful" , "Informally, very many" , "An uncountable number" , "Uncountably many" , "Guarded" .)