Rarer titles, strange and worldly (11)
I believe the answer is:
terrestrial
'worldly' is the definition.
(similar in meaning)
'rarer titles strange' is the wordplay.
'strange' indicates an anagram.
'rarer'+'titles'='rarertitles'
'rarertitles' anagrammed gives 'TERRESTRIAL'.
'and' acts as a link.
(Other definitions for terrestrial that I've seen before include "Living on the ground" , "Not aquatic, arboreal, or aerial" , "Relating to dry land" , "Relating to the earth" , "Land-based" .)