Rough-hewn doorframe almost back in splendour, occupying spot (9)
I believe the answer is:
splintery
'rough-hewn doorframe' is the definition.
The answer and definition are different parts of speech. However, past participle verbs and adjectives occasionally define each other.
'almost back in splendour occupying spot' is the wordplay.
'almost back in splendour' becomes 'linter' (I am not sure about this - if you are sure you should believe this answer much more).
'occupying' indicates putting letters inside (inserted letters occupy or enter the word).
'spot' becomes 'spy' (synonyms).
'linter' placed into 'spy' is 'SPLINTERY'.
Can you help me to learn more?
(Another definition for splintery that I've seen is " dangerous to hands?".)