I belong unfortunately in low birth (7)
I believe the answer is:
ignoble
'low birth' is the definition.
'ignoble' can be an answer for 'low' (I've seen this before). I'm unsure of the 'birth' bit.
'i belong unfortunately' is the wordplay.
'unfortunately' is an anagram indicator (a bad or unfortunate spelling).
'belong' is an anagram of 'gnoble'.
'i'+'gnoble'='IGNOBLE'
'in' is the link.
Can you help me to learn more?
(Other definitions for ignoble that I've seen before include "Lacking dignity" , "Base, not honourable" , "Wretched, base" , "in a lower category" , "Unworthy" .)