The most common and most likely answer to this crossword clue is the 8 letter word PURCHASE
I've seen this crossword clue in The Daily Telegraph
P
U
R
C
H
A
S
E
Buddy explains!
The straight part
We know that "Spend some money on/a grip" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case spend some money on/a grip = purchase.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does PURCHASE mean?
PURCHASE noun- The acquisition of title to, or property in, anything for a price; buying for money or its equivalent.
- That which is obtained, got or acquired, in any manner, honestly or dishonestly; property; possession; acquisition.
- That which is obtained for a price in money or its equivalent.
- The act or process of seeking and obtaining something (e.g. property, etc.)
- A price paid for a house or estate, etc. equal to the amount of the rent or income during the stated number of years.
- Any mechanical hold or advantage, applied to the raising or removing of heavy bodies, as by a lever, a tackle or capstan.
- The apparatus, tackle or device by which such mechanical advantage is gained and in nautical terminology the ratio of such a device, like a pulley, or block and tackle.
- The amount of hold one has from an individual foothold or ledge.
- Acquisition of lands or tenements by means other than descent or inheritance, namely, by one's own act or agreement.
- To buy, obtain by payment of a price in money or its equivalent.
- To pursue and obtain; to acquire by seeking; to gain, obtain, or acquire.
- To obtain by any outlay, as of labor, danger, or sacrifice, etc.
- To expiate by a fine or forfeit.
- To apply to (anything) a device for obtaining a mechanical advantage; to get a purchase upon, or apply a purchase to; to raise or move by mechanical means.
- To put forth effort to obtain anything; to strive; to exert oneself.
- To constitute the buying power for a purchase, have a trading value.