Acquires information but dreads upsetting some constituents (5,2)

I believe the answer is:

reads up

'acquires information' is the definition.
(I've seen this before)

'but dreads upsetting some constituents' is the wordplay.
'some constituents' indicates a hidden word (I've seen 'constituent' mean this).
'READS UP' can be found hidden inside 'but dreads upsetting'.

(Another definition for reads up that I've seen is " Acquires information".)

I've seen this clue in The Irish Times.

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