Evidence of impact? Most of the unemployed losing heart (4)
I believe the answer is:
thud
'evidence of impact?' is the definition.
'thud' can be an answer for 'impact?' (I've seen this before). I am unsure of the 'evidence of' bit.
'most of the unemployed losing heart' is the wordplay.
'most of' means to remove the last letter.
'losing heart' suggests removing the centre.
'unemployed' with its middle removed is 'ud'.
'the' with its last letter removed is 'th'.
'th'+'ud'='THUD'
Can you help me to learn more?
(Other definitions for thud that I've seen before include "Clunk" , "Dull sound made by a falling body" , "Sound made by impact of heavy objects" , "Sound of a heavy fall" , "Clonk" .)