Worship one in a dream, possibly (6)
I believe the answer is:
admire
'worship' is the definition.
(thesaurus)
'one in a dream possibly' is the wordplay.
'one' becomes 'i' (Roman numeral).
'in' means one lot of letters goes inside another.
'possibly' is an anagram indicator.
'dream' is an anagram of 'admre'.
'i' put within 'admre' is 'ADMIRE'.
(Other definitions for admire that I've seen before include "Esteem, have high regard for" , "Look at (someone or something) with pleasure" , "like very much" , "Revere" , "Idolise" .)