Sticky mess in front of new fridge -- oh no! (4,5)
I believe the answer is:
good grief
'oh no' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'sticky mess in front of new fridge' is the wordplay.
'sticky mess' becomes 'goo' (goo is a messy substance. I am not sure about the 'sticky' bit.).
'in front of' is a charade indicator (letters next to each other).
'new' indicates an anagram.
'fridge' with letters rearranged gives 'dgrief'.
'goo'+'dgrief'='GOOD GRIEF'
Can you help me to learn more?
(Other definitions for good grief that I've seen before include "Exasperated utterance" , "I'm dismayed!" , "Exclamation of surprise or dismay" , "Oath given surprisingly" .)