Crossword Genius

Uniform is black trousers, ready to supply (8)

Ross

I believe the answer is:

issuable

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'ready to supply' is the definition.
I can't judge whether this definition defines the answer.

'uniform is black trousers' is the wordplay.
'uniform' becomes 'U' (phonetic alphabet: alpha, bravo, charlie etc.).
'black' becomes 'sable' (heraldic term for black).
'trousers' is an insertion indicator (to trouser can mean to steal or take).
'is'+'sable'='issable'
'u' inserted into 'issable' is 'ISSUABLE'.

Can you help me to learn more?

(Other definitions for issuable that I've seen before include "Fit to be put out" , "Fit for publication" .)

I've seen this clue in The Telegraph.
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