Pessimistic, for example, in domestic surroundings (8)
I believe the answer is:
'pessimistic' is the definition.
(associated in meaning)
'example in domestic surroundings' is the wordplay.
'example' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'in domestic' becomes 'native' (similar in meaning. I am not sure about the 'in' bit.).
'surroundings' is an insertion indicator.
'eg' placed into 'native' is 'NEGATIVE'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for negative that I've seen before include "Expressing or implying denial or refusal" , "Less than positive" , "The photographic film expresses refusal" , "Defeatist" , "Piece of photographic film" .)