Title seems ideal, respectful first of all (3)
I believe the answer is:
sir
'title' is the definition.
(I've seen this before)
'seems ideal respectful first of all' is the wordplay.
'first of all' indicates taking the first letters.
The first letters of 'seems ideal respectful' is 'SIR'.
(Other definitions for sir that I've seen before include "... ___ John Major" , "as Winston Churchill was" , "Way to address gentleman" , "Title for knight or teacher" , "Formal term of address" .)