Hi thom
13a is thematic, 'craft' is usual 3-letter word and rest is half of 8 letter word for 'ambassador' or 'A-gent' This needs adjusting for entry
41a is also thematic, unusual word for a ungulate mammal with additional letter in 'sitter', 'staying' i.e. around, a common 3 letter word for fulfiled. Again this needs adjusting for entry
4d is non-thematic, anagram of 'targe' i.e. 'Target briefly failed' plus two letters for to pass. This gves obscure 5,2 Cambridge exam, one I'd not heard of.