What noble lady may put on a cucumber dish that's cut up (5)
I believe the answer is:
tiara
'what noble lady may put' is the definition.
I can't tell whether this defines the answer.
'a cucumber dish that's cut up' is the wordplay.
'cucumber dish' becomes 'raita' (I've seen this before).
'that's cut' means to remove the last letter.
'up' says the letters should be written backwards (in down clue: letters go upwards).
'a'+'raita'='araita'
'araita' with its final letter taken away is 'arait'.
'arait' reversed gives 'TIARA'.
'on' is the link.
Can you help me to learn more?
(Other definitions for tiara that I've seen before include "Jewelled hair-band" , "Jewelled head wear" , "Jewelled headband" , "Ornamental headpiece" , "High diadem" .)