It's a pity she's out for the morning (5)
I believe the answer is:
shame
'it's a pity' is the definition.
('shame' can be a synonym of 'pity')
'she's out for the morning' is the wordplay.
'out' means to remove the last letter.
'for' says to put letters next to each other.
'the morning' becomes 'ame' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'she' with its final letter taken away is 'sh'.
'sh'+'ame'='SHAME'
Can you help me to learn more?
(Other definitions for shame that I've seen before include "disgraceful" , "Painful emotion resulting from guilt" , "Disgrace, ignominy" , "Feeling of humiliation" , "pity!" .)