With partying, what was guzzled? Conceal disreputable affair (9)
I believe the answer is:
whitewash
'conceal disreputable affair' is the definition.
'whitewash' can be an answer for 'conceal' (whitewashing is a kind of concealing). I'm not certain of the 'disreputable affair' bit.
'with partying what was guzzled?' is the wordplay.
'partying' is an anagram indicator (I've seen 'parties' mean this (the letters move or party around)).
'what' becomes 'eh' (sound used to ask 'what?' or 'pardon?').
'guzzled?' indicates putting letters inside (inserted letters get guzzled up).
'with' with letters rearranged gives 'whit'.
'whit'+'eh'='whiteh'
'whiteh' enclosing 'was' is 'WHITEWASH'.
Can you help me to learn more?
(Other definitions for whitewash that I've seen before include "Wall pigment; defeat" , "Attempt to conceal bad news" , "Used on walls to cover up a misdemeanour?" , "Lime solution; cover up" , "Comprehensive defeat - type of paint" .)