Consternation when boy turns up with girl (6)
I believe the answer is:
dismay
'consternation' is the definition.
(synonyms)
'boy turns up with girl' is the wordplay.
'boy' becomes 'yams' (I can't explain this - if you can you should give a lot more credence to this answer).
'turns up' is a reversal indicator.
'with' is a charade indicator (letters next to each other).
'girl' becomes 'Di' (short for Diane or Diana).
'yams' reversed gives 'smay'.
'smay' put after 'di' is 'DISMAY'.
'when' acts as a link.
Can you help me to learn more?
(Other definitions for dismay that I've seen before include "Horrified amazement" , "Consternation, trepidation" , "Feeling of surprise and discouragement" , "Concern and distress at something unexpected" , "Alarm, apprehension" .)