Maiden title included in new deal (6)
I believe the answer is:
damsel
'maiden' is the definition.
(I've seen this before)
'title included in new deal' is the wordplay.
'title' becomes 'Ms' (title used by some women).
'included in' means one lot of letters goes inside another.
'new' indicates an anagram.
'deal' is an anagram of 'dael'.
'ms' put within 'dael' is 'DAMSEL'.
(Other definitions for damsel that I've seen before include "Young woman (archaic)" , "Medals (anag.)" , "Girl - type of fly" , "Maid" , "Young girl" .)