Hobby for which I'm covered in glue! (7)
I believe the answer is:
pastime
'hobby' is the definition.
(I've seen this before)
'i'm covered in glue' is the wordplay.
'covered in' indicates putting letters inside.
'glue' becomes 'paste' (synonyms).
'im' put into 'paste' is 'PASTIME'.
'for which' acts as a link.
(Other definitions for pastime that I've seen before include "doing the crossword, say" , "Hobby; regular activity" , "Leisure pursuit" , "Hobby - recreation" , "diversion" .)