Meant somehow to conceal the repair and the alteration (9)
I believe the answer is:
amendment
'the alteration' is the definition.
(I've seen this before)
'meant somehow to conceal the repair' is the wordplay.
'somehow' indicates an anagram.
'to conceal' indicates putting letters inside.
'the repair' becomes 'mend' (I've seen this before).
'meant' anagrammed gives 'ament'.
'ament' going around 'mend' is 'AMENDMENT'.
'and' is the link.
(Other definitions for amendment that I've seen before include "Change designed to improve a text" , "Addition or alteration, to a motion or official document, say" , "Statement added to or revising a document" , "Correction" , "Corrective treatment" .)