Dressing an immature man, having laugh about it (5,5)
I believe the answer is:
salad cream
'dressing' is the definition.
(I know that salad cream is a type of dressing)
'an immature man having laugh about it' is the wordplay.
I cannot really understand how this works, but
'an' could be 'a' and 'a' is located in the answer.
'man' could be 'lad' (I have seen 'Young man' mean 'lad' so perhaps 'man' could also mean 'lad') and 'lad' is found in the answer.
'laugh' could be 'scream' (scream is a kind of laugh) and 'scream' is found in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for salad cream that I've seen before include "Dressing like mayonnaise" , "Sauce" .)