Laura's essentially supporting run through Kitty , being in Ireland (6)

'in ireland' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'laura's essentially supporting run through kitty' is the wordplay.
'essentially' indicates the central letters.
'supporting' says to put letters next to each other (in a down clue, some letters go below others).
'run' becomes 'r' (cricket abbreviation).
'through' indicates putting letters inside (inserted letters go through the word).
'kitty' becomes 'cat'.
The centre of 'lauras' is 'ur'.
'r' placed inside 'cat' is 'crat'.
'ur' after 'crat' is 'CRATUR'.

'being' acts as a link.

Can you help me to learn more?