Percussionist daughter getting increasingly weird (7)

I believe the answer is:

drummer

I'm a little stuck... Click here to teach me more about this clue!

'percussionist' is the definition.
(drummer is a kind of percussionist)

'daughter getting increasingly weird' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'getting' says to put letters next to each other.
'increasingly' becomes 'mer' (I can't justify this - if you can you should believe this answer much more).
'weird' becomes 'rum' (rum can mean strange).
'mer' after 'rum' is 'rummer'.
'd'+'rummer'='DRUMMER'

Can you help me to learn more?

(Other definitions for drummer that I've seen before include "Someone who keeps 18 [RHYTHM]" , "Band's percussionist" , "Group member" , "salesman to America" , "One using sticks" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.