Quiet girl at museum finally finding David's work (5)
I believe the answer is:
psalm
'david's work' is the definition.
(David wrote the biblical Psalms)
'quiet girl at museum finally' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'girl' becomes 'sal' (feminine given name).
'at' says to put letters next to each other.
'finally' indicates one should take the final letters.
The final letter of 'museum' is 'm'.
'p'+'sal'+'m'='PSALM'
'finding' is the link.
(Other definitions for psalm that I've seen before include "Jewish hymn" , "A song which praises" , "Song of David" , "Church hymn" , "What's heard in church" .)