The first stranger accommodated large youngster (7)
I believe the answer is:
toddler
'youngster' is the definition.
(I know that Toddler is a type of youngster)
'the first stranger accommodated large' is the wordplay.
I cannot really understand how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
'large' could be 'l' (eg in clothes sizes) and 'l' is located in the answer.
'stranger' could be 'odder' (more odd) and 'odder' is found in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for toddler that I've seen before include "Child just learning to walk" , "Lord Ted (anag)" , "Feeble walker" , "One is learning to walk" , "Young child" .)