Ally worried about Richard - not difficult, poetic (7)
I believe the answer is:
lyrical
'poetic' is the definition.
(I've seen this before)
'ally worried about richard' is the wordplay.
'worried' indicates anagramming the letters.
'about' indicates putting letters inside.
'richard' becomes 'ric' (short form).
'ally' anagrammed gives 'lyal'.
'lyal' going around 'ric' is 'LYRICAL'.
'not difficult' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for lyrical that I've seen before include "In poetic words, song-like" , "Using poetic language, wax thus (7)" , "Using poetic or song-like language" , "Songful" , "Expressing deep emotion" .)