Sun blends with last Turk rulers (7)
I believe the answer is:
sultans
'turk rulers' is the definition.
'sultans' can be an answer for 'rulers' (sultan is a kind of ruler). I'm not certain of the 'turk' bit.
'sun blends with last' is the wordplay.
'blends with' is an anagram indicator (I've seen 'blending' mean this (letters blended or mixed into a new form)).
'sun' anagrammed with 'last' gives 'SULTANS'.
Can you help me to learn more?
(Another definition for sultans that I've seen is " Eastern rulers".)