Announced fruit's value (5)
I believe the answer is:
gauge
'value' is the definition.
(thesaurus)
'announced fruit's' is the wordplay.
'announced' shows a homophone (sound like).
'fruit' becomes 'gage' (a greengage or gage is a type of fruit).
'gage' sounds like 'GAUGE'.
(Other definitions for gauge that I've seen before include "Distance between the rails of a railway track" , "Instrument to measure or test" , "Measuring instrument" , "Measure(r)" , "Estimate, form judgement of" .)