Related to that nice Mr. Adair? (7)
I believe the answer is:
kindred
'related to that nice mr adair?' is the definition.
'kindred' can be an answer for 'related' (I've seen this in another clue). I'm unsure of the remainder of the definition.
'related to that nice mr' is the wordplay.
'related' becomes 'r' (this might be a standard abbreviation which I don't know about).
'to' means one lot of letters go next to another (I've seen this in other clues).
'that nice' becomes 'kind' (nice can mean kind or generous).
'mr' becomes 'Ed' (short for Edward).
'r' put after 'kind' is 'kindr'.
'kindr'+'ed'='KINDRED'
Can you help me to learn more?
(Other definitions for kindred that I've seen before include "Related by blood - having similar qualities" , "[TRIBAL]" , "clan" , "Family - similar" , "Affinity" .)