Nevertheless needed in pretty etchings (3)
I believe the answer is:
yet
'nevertheless' is the definition.
(thesaurus)
'in pretty etchings' is the wordplay.
'in' indicates the answer is hidden within the clue.
'YET' can be found hidden inside 'pretty etchings'.
'needed' acts as a link.
(Other definitions for yet that I've seen before include "Though; still" , "Still; however" , "'But, however (3)'" , "Thus far" , "Although" .)