Crossword Genius

I’m all about cutting grass, being expertly trained (4-5)

Ross

I believe the answer is:

well-aimed

I'm a little stuck... Click here to teach me more about this clue!

'expertly trained' is the definition.
(I've seen this before)

'i'm all about cutting grass' is the wordplay.
'about' is an anagram indicator.
'cutting' means one lot of letters goes inside another (some letters cut their way into a word).
'grass' becomes 'weed' (I am not sure about this - if you are sure you should believe this answer much more).
'im'+'all'='imall'
'imall' anagrammed gives 'llaim'.
'llaim' put inside 'weed' is 'WELL-AIMED'.

'being' is the link.

Can you help me to learn more?

I've seen this clue in The Sunday Times and The Times.
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