Presumably loose clothing right for this? (7,5)
I believe the answer is:
slumber party
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'presumably loose clothing right' is the wordplay.
'loose' indicates an anagram (letters are loosened from their original positions).
'clothing' is an insertion indicator (some letters cover up or clothe others).
'right' becomes 'rt' (abbreviation as in Rt Hon- the Right Honourable).
'presumably' with letters rearranged gives 'slumberpay'.
'slumberpay' enclosing 'rt' is 'SLUMBER PARTY'.
'for' is the link.
Can you help me to learn more?
(Other definitions for slumber party that I've seen before include "some do all night" , "Overnight social event for (American) teenage girls" , "Overnight gathering of young girls (in pyjamas?)" .)