Park it in garden at first? That's telling (8)

I believe the answer is:

reciting

'telling' is the definition.
('recite' can be a synonym of 'tell')

'park it in garden at first?' is the wordplay.
'park' becomes 'rec' (short for recreation ground).
'at first?' says to take the initial letters (I've seen 'at first' mean this).
The initial letter of 'garden' is 'g'.
'rec'+'it'+'in'+'g'='RECITING'

'that's' is the link.

I've seen this clue in The Telegraph.

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