Inner part of a wrecked tug (3)
I believe the answer is:
gut
'inner' is the definition.
(thesaurus)
'part of a wrecked tug' is the wordplay.
'tug' anagrams to 'GUT'.
Though, I'm not clear how this is indicated.
Can you help me to learn more?
(Other definitions for gut that I've seen before include "Food processor" , "one's bust in strenuous effort" , "Part of body" , "Eviscerate" , "The stuff of a violin string" .)