It's all about "Me"

Across

1To combine or unite with something to form a single entity (5)
4Wandered slowly and aimlessly (9)
9A person who wagers money on the outcome of games or sporting events (7)
10An officious annoying person who interferes with others (7)
11Sacred song or poem of praise (5)
13Somebody’s stomach ( informal ) (5)
15A very slight amount or degree of something (3)
16Be obligated to pay somebody money (3)
17Workers especially in an office hired on a temporary basis (5)
19A communications device used to connect computers by a telephone line (5)
21Looney Tunes cartoon character, _____ Fudd (5)
23An underground room or vault, often below a church (5)
24Make imperfect (3)
25A metric unit of volume equal to one thousandth of a liter (3)
26Any of the usual occasions, when a substantial amount of food is eaten (5)
28Big (5)
29For climbing up or down (7)
31USA (7)
33The condition of being essential or indispensable (9)
34Full of or showing high-spirit (5)

Down

1Funnel-shaped device to amplify the voice (9)
2Go through things looking for something (7)
3Elongate fatty-fleshed fish (3)
4Value that deserves respect and acknowledgment (5)
5Point an object (3)
6An informal term for a father (5)
7Connected by kinship, common origin, or marriage (7)
8Challenged somebody to do something (5)
12A device that measures and records the quantity or flow of something such as electricity, gas, water, distance, or time (5)
14Dirty and disorderly (5)
18A city in western Saudi Arabia (5)
19Type of chemical element (5)
20A person hired to fight for another country than their own (9)
22Containing or constituting or characterized by pleasing melody (7)
24More jovial (7)
25Round juicy gourd fruit (5)
26Gets or comes together (5)
27Wobbly (5)
30Gliding over snow (3)
32Important timber or shade tree (3)