Investigative assistant takes hour creating current programme (5,2)

I believe the answer is:

whats on

'current programme' is the definition.
(what's on TV currently)

'investigative assistant takes hour' is the wordplay.
'investigative assistant' becomes 'Watson' (Dr Watson, associate of Sherlock Holmes).
'takes' means one lot of letters goes inside another.
'hour' becomes 'h'.
'watson' enclosing 'h' is 'WHATS ON'.

'creating' is the link.

I've seen this clue in The Guardian.

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