Eat dirt, maybe, but not in one's birthday suit! (7)
I believe the answer is:
attired
'not in one's birthday suit' is the definition.
I can't judge whether this definition defines the answer.
'eat dirt maybe' is the wordplay.
'maybe' is an anagram indicator.
'eat'+'dirt'='eatdirt'
'eatdirt' is an anagram of 'ATTIRED'.
'but' is the link.
Can you help me to learn more?
(Other definitions for attired that I've seen before include "Dressed or clothed" , "Wearing clothes" , "Turned out" , "surrounded by duds" , "got up" .)