Little Richard, perhaps, by yard and garden (7)
I believe the answer is:
rockery
'garden' is the definition.
(I know that rockery is a type of garden)
'little richard perhaps by yard' is the wordplay.
'little' suggests taking the first letters.
'perhaps by' becomes 'ocker' (I can't justify this - if you can you should give a lot more credence to this answer).
'yard' becomes 'y' (abbreviation).
The initial letter of 'richard' is 'r'.
'r'+'ocker'+'y'='ROCKERY'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for rockery that I've seen before include "Part of garden" , "Garden feature with alpines" , "Garden alpine area" .)