Mother sees fellow acquire a shade of red (7)
I believe the answer is:
magenta
'shade of red' is the definition.
(I've seen this in another clue)
'mother sees fellow acquire a' is the wordplay.
I cannot really understand how this works, but
'mother' could be 'ma' (Ma is another word for mother or mum) and 'ma' is found within the answer.
'fellow' could be 'gent' (synonyms) and 'gent' is present in the answer.
'a' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for magenta that I've seen before include "Bright purplish-red" , "French victory" , "Colourful" , "Purplish-pink colour" , "Deep purplish red" .)