Committed and old-fashioned about playing dice (9)
I believe the answer is:
dedicated
'committed' is the definition.
('dedicated' can be similar in meaning to 'committed')
'old-fashioned about playing dice' is the wordplay.
'old fashioned' becomes 'dated' (I've seen this before).
'about' means one lot of letters goes inside another.
'playing' indicates anagramming the letters.
'dice' is an anagram of 'edic'.
'dated' enclosing 'edic' is 'DEDICATED'.
'and' is the link.
(Other definitions for dedicated that I've seen before include "Determined" , "Devoted to a cause or ideal 99)" , "Devoted to a particular cause or purpose" , "Diligent" , "Customised" .)