One out to deeply impress uninhibited Penge party-goer (8)
I believe the answer is:
engraver
'uninhibited penge party-goer' is the definition.
I can't judge whether this defines the answer.
'one out to deeply impress' is the wordplay.
'one out' becomes 'r' (I am not sure about this - if you are sure you should believe this answer much more).
'to' says to put letters next to each other (I've seen this in other clues).
'deeply impress' becomes 'engrave' (I've seen this before).
'r' put after 'engrave' is 'ENGRAVER'.
Can you help me to learn more?
(Other definitions for engraver that I've seen before include "who makes an impression?" , "Carver of letters etc." , "Artist working on stone etc" , "Craftsman carving a design" , "One who cuts or incises" .)