Suddenly appearing to blend into space close to Bert (8)
I believe the answer is:
emergent
'suddenly appearing' is the definition.
(I've seen this before)
'blend into space close to bert' is the wordplay.
'blend' becomes 'merge' ('merge' can be a synonym of 'blend'**).
'into' means one lot of letters goes inside another.
'space' becomes 'en'.
'close to' says to take the final letters (the close/ending of).
The final letter of 'bert' is 't'.
'merge' going inside 'en' is 'emergen'.
'emergen'+'t'='EMERGENT'
'to' acts as a link.
(Other definitions for emergent that I've seen before include "Newly independent" , "achieving prominence" , "coming into view" , "Breaking" , "In the process of coming into prominence" .)