Piano, delivered outside, provides beat (5)
I believe the answer is:
spent
'beat' is the definition.
(thesaurus)
'piano delivered outside' is the wordplay.
'piano' becomes 'p'.
'delivered' becomes 'sent'.
'outside' indicates putting letters inside.
'p' put within 'sent' is 'SPENT'.
'provides' is the link.
(Other definitions for spent that I've seen before include "Worn out having paid out money." , "Paid out - finished" , "Worn out, having laid out money" , "Exhausted, having paid money?" , "Drained of energy - or paid out" .)